Question

Решите пожалуйста надо срочно

Answer 1

$1)7a - 5ay + 9 - 21a + 4ay = \\ - 14a - ay + 9$
$2)a)5y(4p - 5y) \\ b)7 {e}^{2} (4 {e}^{3} + 1)$
$3)19x - 8x + 8 = 15x + 30 \\ 11x + 8 = 15x + 30$
$11x + 8 - 15x - 30 = 0 \\ - 4x - 22 = 0 \\ - 4x = 22 \\ x = - \frac{22}{4} = - 5 \frac{2}{4} = - 5.5$

Answer 2

1.

a) (7a-5ay+9)-(21a-4ay) = 7a-5ay+9-21a+4ay = 9-ay-14a

b) 5x²(2x³-3) = 5x²*2x³-3*5x² = 10x⁵-15x²

2.

a) 20yp - 25y² = 5y * 4p-5y * 5y = 5y(4p-5y)

b) 28e⁵+7e² = 7e² * 4e³ + 7e² = 7e²(4e³+1)

3.

19x-8(x-1) = 15(x+2)

19x-8x+8 = 15x+30

11x-15x = 30-8

-4x = 22

x = -22/4 = -11/2 = -5.5

Ответ: x = -5.5