Question

ПОМОГИТЕ!!!, ДАЮ 100 БАЛЛОВ
СРОЧНО!!!

Answer 1

Ответ:

1)

1. 6x^2 - 17x

2. 4x^3 - 8x

3.x^2 - 2x - 35

4.6x^2 + 11x - 35

2)

1.x = -0.5

2.x = -4

Объяснение:

1.

1. 8x^2 - 12x - 2x^2 - 5x = 6x^2 - 17x

2. 4x(x^2 + 3x -2) - 12x^2 = 4x^3 + 12x^2 - 8x - 12x^2 = 4x^3 - 8x

3. (x + 5)(x - 7) = x^2 - 7x + 5x - 35 = x^2 - 2x - 35

4. (3x - 5)(2x + 7) = 6x^2 + 21x - 10x - 35 = 6x^2 + 11x - 35

2.1)

x^2 + 4x + 1 = x(x+2)

x^2 + 4x + 1 = x^2 + 2x

4x + 1 = 2x

2x + 1 = 0

2x = -1

x = -0.5

2.2)

(x-2)/3 = (2+3x)/5

5(x-2) = 3(3x+2)

5x - 10 = 9x + 6

5x - 16 = 9x

-16 = 4x

x = -4

3)

abc c чёрточкой сверху равно 100а + 10b + c.

100a + 10b + c - (a+b+c) = 99a + 9b = 9(11a + b)