Предмет: Алгебра, автор: мистердудец4

(a+b)^2-5a-5b
4x^2-y^4
помогите решить эти примеры

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Автор ответа: aida20024
0
a^2+2ab+b^2-5a-5b=(a^2-5a)+(b^2-5b)+
+2ab=a(a-5a)+b(b-5b)=ab×(-4a)(-4b)+2ab=3ab(-4a)(-4b)=-12a^2b-12ab^2=-12ab(a+b)
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Read the text "Regular physical activity".

Optimal-Use-Of-Physical-Exercise-To-Improve.jpg

Regular physical activity can produce long term health benefits. People of all ages, shapes, sizes, and abilities can benefit from being physically active. The more physical activity you do, the greater the health benefits.

Being physically active can help you:

• Increase your chances of living longer

• Feel better about yourself

• Decrease your chances of becoming depressed

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• Have stronger muscles and bones

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Physical activity and nutrition work together for better health. Being active increases the amount of calories burned. As people age their metabolism slows, so maintaining energy balance requires moving more and eating less.

Some types of physical activity are especially beneficial:

• Aerobic activities make you breathe harder and make your heart beat faster. Aerobic activities can be moderate or vigorous in their intensity. Vigorous activities take more effort than moderate ones. For moderate activities, you can talk while you do them, but you can't sing. For vigorous activities, you can only say a few words without stopping to catch your breath.

• Muscle-strengthening activities make your muscles stronger. These include activities like push-ups and lifting weights. It is important to work all the different parts of the body - your legs, hips, back, chest, stomach, shoulders, and arms.

• Bone-strengthening activities make your bones stronger. Bone strengthening activities, like jumping, are especially important for children and adolescents. These activities produce a force on the bones that promotes bone growth and strength.

• Balance and stretching activities enhance physical stability and flexibility, which reduces risk of injuries. Examples are gentle stretching, dancing, yoga, martial arts, and t'ai chi.

Match the parts of these sentences. Write the correct number of the second part (1,2,3...).

The first part:

1. Being physically active can help you increase

2. Some types of physical activity

3. Balance and stretching activities enhance physical stability and flexibility,

The second part:

1) long term health benefits.

2) benefit from being physically active.

3) the health benefits.

4) your chances of living longer.

5) you are more likely to get type 2 diabetes.

6) together for better health.

7) calories burned.

8) are especially beneficial.

9) your heart beat faster.

10) vigorous in their intensity.

11) important for children and adolescents.

12) which reduces risk of injuries.
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