Question

Помогите, пожалуйста, решить!​

Answer 1

Ответ:

1. p^2 + 16p + 64

2. 100x^2 - 60xy + 9y^2

3. x^2 - 81

4. 28mn - 16m^2 + 49n^2 - 28mn = 49n^2 - 16m^2

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1. (4-c)^2

2. (3m)^2 - 5^2 = (3m-5)(3m+5)

3. (p+1)^2

4. (6m+2n)^2

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a^2 - 20a + 100 - a^2 + 25 = 125 - 20a

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2x^2 + 2x - 7x - 7 + 3(16x^2 + 4x - 4x - 1) = 2(25x^2 - 20x + 4) - 53

2x^2 - 5x - 7 + 48x^2 - 3 = 50x^2 - 40x + 8 - 53

50x^2 - 5x - 10 = 50x^2 - 40x - 45

- 5x - 10 =  - 40x - 45 /

35x = -35

x = -1

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Это пятое задание (3a + 1 - a - 6)(3a + 1 + a + 6) = (2a - 5)(4a + 7)

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6) (4 - х^2)(4 + x^2) + ((6 - x^2))^2 = (16 - x^4) + (6 - x^2)^2 = 16 - x^4 + 36 - 12x^2 + x^4 = -12x^2 + 52

Решение при х = -1/2

-12 * (1/4) + 52 = -3 + 52 = 49