Հորիզոնական

a)ամենափոքր պարզ երկնիշ թվի քառակուսին

c)քառակուսի, որի վերջին թվանշանը հավասար է հիմքի թվանշանների գումարին

d)քառակուսի, որի թվանշանների գումարը հավասար է հիմքի թվանշանների գումարին

f)եռանիշ ամենամեծ թիվը, որը լրիվ քառակուսի է

h)պարզ թիվ, ոի առաջին երկու թվանշանների տեղերը փոխելով առաջացած թիվը նույնպես պարզ է

j) պարզ թիվ, որը ստացվում է հորիզոնական d թվի թվանշանների տեղերը փոխելով

l) ուղղաձիգ գրված q թվի քառակուսին

m) պարզ թիվ, որի երկրորդ թվանշանը 8 է

o)պարզ թիվ, որը առաջին և վերջին թվանշանները նույնն են, և 70-ով մեծ է k ուղղաձիգում գրված թվից

q)պարզ թիվ, որի առաջին թվանշանը հավասար է մյուսների գումարին

s) քառակուսի, որ վերջին երկու թվանշանները նույնն են

t)պարզ թիվ, որը 100-ով մեծ է i ուղղաձիգում գրված թվից

u)պարզ թիվ, որի առաջին երկու թվանշանների գումարը հավասար է երրորդին:

                                 Ուղղաձիգ

a)քառակուսի, որը գրվում է նույն թվանշաններով, ինչ f հորիզոնականի թիվը

b)պարզ թիվ, որի առաջին և վերջին թվանշանները նույնն են

c)քառակուսի, որի առաջին թվանշանը հավասար է հիմքի թվանշանների գումարին

e)քառակուսի, որը գրվում է նույն թվանշաններով, ինչ a ուղղաձիգում գրված թիվը

g) t հորիզոնականում գրված թվի քառակուսին

h) քառակուսի, որի առաջին երկու թվանշանները նույնն են

i)պարզ թիվ, որը սկսվում և վերջանում է 1-ով

J) պարզ թիվ, որը ստացվում է b ուղղաձիգում գրված թվի երկրորդ և երրորդ թվանշանների տեղերը փոխելով

k) պարզ թիվ, որի երկրորդ թվանշանը 1 է

n) քառակուսի, որի առաջին թվանշանը երկու անգամ մեծ է երկրորդից

p)պարզ թիվ, որի առաջին երկու թվանշանները նույնն են

q)պարզ թիվ, որը 10-ով փոքր է t հորիզոնականում գրված թվից

r) պարզ թիվ, որը 8-ով մեծ է a հորիզոնականում գրված թվից:

29/09/20

Առաջադրանք 1.

Առաջադրանք 2.

Առաջադրանք 3.

Առաջադրանք 1

ա) 3×(x²-1)=0

     x²-1=0

     x²=1

     -1;+1

բ) 2x²=0

    x=0

գ) x(x-1)=0

     x=0

     կամ

     x-1=0

     x=1

դ) (x+3)x=0

     x=0

     կամ

     x+3=0

     x=-3

ե) (x-3)(x+2)=0

     x-3=0

     x=3

     կամ

     x+2=0

     x+2=0

     x=-2

զ) (x+5)(x-7)=0

     x+5=0

     x=-5

     կամ

     x-7=0

     x=7

է) 3x(x-0.5)=0

    x-0.5=0

    x=0.5

    կամ

    3x=0

ը) 0.5x(2+x)=0

     2+x=0

     կամ

     x=0

թ) 3(x-8)(5+x)=0

     x-8=0

     x=8

     կամ

     5+x=0

     x=-5

     x=0

Առաջադրանք 2

ա) x²-4x=0

      x(x-4)=0

      կամ

      x=0

      x-4=0

բ) x²+6x=6

     x(x+6)=0

     x+6=0

     x=-6

     x=0

գ) 3x²+x=0

     x(3x+1)=0

     x=0

     կամ

     3x+1=0

     3x=1=0

     x=-1/3

դ) x²-0.5x=0

     x(x-0.5)=0

     x=0

     կամ

     x-0.5=0

     x=0.5

ե) 2x+3x²=0

     x(2+3x)=0

     x=0

     կամ

     2+3x=0

     2+3x=0

     x=-2/3

How COVID-19  Spreads

Person-to-person spread

The virus is thought to spread mainly from person-to-person.

• Between people who are in close contact with one another (within about 6 feet).
• Through respiratory droplets produced when an infected person coughs or sneezes.

These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.

Can someone spread the virus without being sick?

• People are thought to be most contagious when they are most symptomatic (the sickest).
• Some spread might be possible before people show symptoms; there have been reports of this occurring with this new coronavirus, but this is not thought to be the main way the virus spreads.
• Watch for symptoms
• Reported illnesses have ranged from mild symptoms to severe illness and death for confirmed coronavirus disease 2019 (COVID-19) cases.
• The following symptoms may appear 2-14 days after exposure.*
• Fever
• Cough
• Shortness of breath

Watch for symptoms

Reported illnesses have ranged from mild symptoms to severe illness and death for confirmed coronavirus disease 2019 (COVID-19) cases.

The following symptoms may appear 2-14 days after exposure.^*

• Fever
• Cough
• Shortness of breath

Know How it Spreads

• There is currently no vaccine to prevent coronavirus disease 2019 (COVID-19).
• The best way to prevent illness is to avoid being exposed to this virus.
• The virus is thought to spread mainly from person-to-person.
  • Between people who are in close contact with one another (within about 6 feet).
  • Through respiratory droplets produced when an infected person coughs or sneezes.
• These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.

Take steps to protect yourself

Clean your hands often

• Wash your hands often with soap and water for at least 20 seconds especially after you have been in a public place, or after blowing your nose, coughing, or sneezing.
• If soap and water are not readily available, use a hand sanitizer that contains at least 60% alcohol. Cover all surfaces of your hands and rub them together until they feel dry.
• Avoid touching your eyes, nose, and mouth with unwashed hands.

Avoid close contact

• Avoid close contact with people who are sick
• Put distance between yourself and other people if COVID-19 is spreading in your community. This is especially important for people who are at higher risk of getting very sick.

Take steps to protect others

Stay home if you’re sick

• Stay home if you are sick, except to get medical care. Learn what to do if you are sick.

Cover coughs and sneezes

• Cover your mouth and nose with a tissue when you cough or sneeze or use the inside of your elbow.
• Throw used tissues in the trash.
• Immediately wash your hands with soap and water for at least 20 seconds. If soap and water are not readily available, clean your hands with a hand sanitizer that contains at least 60% alcohol.

Wear a facemask if you are sick

• If you are sick: You should wear a facemask when you are around other people (e.g., sharing a room or vehicle) and before you enter a healthcare provider’s office. If you are not able to wear a facemask (for example, because it causes trouble breathing), then you should do your best to cover your coughs and sneezes, and people who are caring for you should wear a facemask if they enter your room. Learn what to do if you are sick.
• If you are NOT sick: You do not need to wear a facemask unless you are caring for someone who is sick (and they are not able to wear a facemask). Facemasks may be in short supply and they should be saved for caregivers.

Clean and disinfect

• Clean AND disinfect frequently touched surfaces daily. This includes tables, doorknobs, light switches, countertops, handles, desks, phones, keyboards, toilets, faucets, and sinks.
• If surfaces are dirty, clean them: Use detergent or soap and water prior to disinfection.

Reducing Stigma

Knowing and sharing Facts can help stop stigma

• Share facts about COVID-19
• COVID-19 FAQs

Public health emergencies, such as the outbreak of coronavirus disease 2019 (COVID-19), are stressful times for people and communities. Fear and anxiety about a disease can lead to social stigma (1) toward people, places, or things. For example, stigma and discrimination can occur when people associate a disease, such as COVID-19, with a population or nationality, even though not everyone in that population or from that region is specifically at risk for the disease. Stigma can also occur after a person has been released from COVID-19 quarantine even though they are not considered a risk for spreading the virus to others.

It is important to remember that people – including those of Asian descent – who do not live in or have not recently been in an area of ongoing spread of the virus that causes COVID-19, or have not been in contact with a person who is a confirmed or suspected case of COVID-19 are not at greater risk of spreading COVID-19 than other Americans.

Some groups of people who may be experiencing stigma because of COVID-19 include:

• Persons of Asian descent
• People who have traveled
• Emergency responders or healthcare professionals

Stigma hurts everyone by creating fear or anger towards other people.

Stigmatized groups may be subjected to:

• Social avoidance or rejection
• Denials of healthcare, education, housing or employment
• Physical violence.

Stigma affects the emotional or mental health (2) of stigmatized groups and the communities they live in. Stopping stigma is important to making communities and community members resilient (3). See resources on mental health and coping during COVID-19.

Everyone can help stop stigma related to COVID-19 by knowing the facts and sharing them with others in your community.

Communicators and public health officials can help counter stigma during the COVID-19 response.

• Maintain privacy and confidentiality of those seeking healthcare and those who may be part of any contact investigation.
• Quickly communicate the risk or lack of risk from associations with products, people, and places.
• Raise awareness about COVID-19 without increasing fear.
• Share accurate information about how the virus spreads.
• Speak out against negative behaviors, including negative statements on social media about groups of people, or exclusion of people who pose no risk from regular activities.
• Be cautious about the images that are shared. Make sure they do not reinforce stereotypes.
• Engage with stigmatized groups in person and through media channels including news media and social media.
• Thank healthcare workers and responders. People who have traveled to areas where the COVID-19 outbreak is happening to help have performed a valuable service to everyone by helping make sure this disease does not spread further.
• Share the need for social support for people who have returned from China or are worried about friends or relatives in the affected region.

Steps to help prevent the spread of COVID-19 if you are sick

Follow the steps below:  If you are sick with COVID-19 or think you might have it, follow the steps below to help protect other people in your home and community.

Stay home except to get medical care

• Stay home: People who are mildly ill with COVID-19 are able to recover at home. Do not leave, except to get medical care. Do not visit public areas.
• Stay in touch with your doctor. Call before you get medical care. Be sure to get care if you feel worse or you think it is an emergency.
• Avoid public transportation: Avoid using public transportation, ride-sharing, or taxis.

Separate yourself from other people in your home, this is known as home isolation

• Stay away from others: As much as possible, you should stay in a specific “sick room” and away from other people in your home. Use a separate bathroom, if available.
• Limit contact with pets & animals: You should restrict contact with pets and other animals, just like you would around other people.
  • Although there have not been reports of pets or other animals becoming sick with COVID-19, it is still recommended that people with the virus limit contact with animals until more information is known.
  • When possible, have another member of your household care for your animals while you are sick with COVID-19. If you must care for your pet or be around animals while you are sick, wash your hands before and after you interact with them. See COVID-19 and Animals for more information.

If someone in your home is sick

Call ahead before visiting your doctor

• Call ahead: If you have a medical appointment, call your doctor’s office or emergency department, and tell them you have or may have COVID-19. This will help the office protect themselves and other patients.

Wear a facemask if you are sick

• If you are sick: You should wear a facemask when you are around other people and before you enter a healthcare provider’s office.
• If you are caring for others: If the person who is sick is not able to wear a facemask (for example, because it causes trouble breathing), then people who live in the home should stay in a different room. When caregivers enter the room of the sick person, they should wear a facemask. Visitors, other than caregivers, are not recommended.

Cover your coughs and sneezes

• Cover: Cover your mouth and nose with a tissue when you cough or sneeze.
• Dispose: Throw used tissues in a lined trash can.
• Wash hands: Immediately wash your hands with soap and water for at least 20 seconds. If soap and water are not available, clean your hands with an alcohol-based hand sanitizer that contains at least 60% alcohol.

Clean your hands often

• Wash hands: Wash your hands often with soap and water for at least 20 seconds. This is especially important after blowing your nose, coughing, or sneezing; going to the bathroom; and before eating or preparing food.
• Hand sanitizer: If soap and water are not available, use an alcohol-based hand sanitizer with at least 60% alcohol, covering all surfaces of your hands and rubbing them together until they feel dry.
• Soap and water: Soap and water are the best option, especially if hands are visibly dirty.
• Avoid touching: Avoid touching your eyes, nose, and mouth with unwashed hands.

Handwashing tips

Avoid sharing personal household items

• Do not share: Do not share dishes, drinking glasses, cups, eating utensils, towels, or bedding with other people in your home.
• Wash thoroughly after use: After using these items, wash them thoroughly with soap and water or put in the dishwasher.

Clean all “high-touch” surfaces everyday

Clean high-touch surfaces in your isolation area (“sick room” and bathroom) every day; let a caregiver clean and disinfect high-touch surfaces in other areas of the home.

• Clean and disinfect: Routinely clean high-touch surfaces in your “sick room” and bathroom. Let someone else clean and disinfect surfaces in common areas, but not your bedroom and bathroom.

• If a caregiver or other person needs to clean and disinfect a sick person’s bedroom or bathroom, they should do so on an as-needed basis. The caregiver/other person should wear a mask and wait as long as possible after the sick person has used the bathroom.

High-touch surfaces include phones, remote controls, counters, tabletops, doorknobs, bathroom fixtures, toilets, keyboards, tablets, and bedside tables.

• Clean and disinfect areas that may have blood, stool, or body fluids on them.
• Household cleaners and disinfectants: Clean the area or item with soap and water or another detergent if it is dirty. Then, use a household disinfectant.

• Be sure to follow the instructions on the label to ensure safe and effective use of the product. Many products recommend keeping the surface wet for several minutes to ensure germs are killed. Many also recommend precautions such as wearing gloves and making sure you have good ventilation during use of the product.
• Most EPA-registered household disinfectants should be effective. A full list of disinfectants can be found hereexternal icon.

Complete disinfection guidance

Monitor your symptoms

• Seek medical attention, but call first: Seek medical care right away if your illness is worsening (for example, if you have difficulty breathing).
  • Call your doctor before going in: Before going to the doctor’s office or emergency room, call ahead and tell them your symptoms. They will tell you what to do.
• Wear a facemask: If possible, put on a facemask before you enter the building. If you can’t put on a facemask, try to keep a safe distance from other people (at least 6 feet away). This will help protect the people in the office or waiting room.
• Follow care instructions from your healthcare provider and local health department: Your local health authorities will give instructions on checking your symptoms and reporting information.

alert icon

Call 911 if you have a medical emergency: If you have a medical emergency and need to call 911, notify the operator that you have or think you might have, COVID-19. If possible, put on a facemask before medical help arrives.

How to discontinue home isolation

• People with COVID-19 who have stayed home (home isolated) can stop home isolation under the following conditions:
  • If you will not have a test to determine if you are still contagious, you can leave home after these three things have happened:

• You have had no fever for at least 72 hours (that is three full days of no fever without the use medicine that reduces fevers)
  AND
• other symptoms have improved (for example, when your cough or shortness of breath have improved)
  AND
• at least 7 days have passed since your symptoms first appeared