Question

СРОЧНО!! РЕШИТЕ УМОЛЯЮ!!!!

Answer 1

1) x^2 -3x-7x+21

x(x-3)-7(x-3)

(x-3)(x-7)

Answer 2

2) 5y^2 + 10y-y-2

Answer 3

5y(y+2)-(y+2)

Answer 4

Во втором ответ: (y+2)(5y-1)