Question

Помогите пожалуйста!! ((​

Answer 1

$7xy-7y=7y(x-1)\\\\2n^4z+6n^3z^2-26n^2z^3=2n^2z(n^2+3nz-13z^2)\\\\m(3m+7)-12(3m+7)=(3m+7)(m-12)$

Answer 2

7y(x-1)

2n²z(n²+3nz-13z²)

3m²+7m-36m-84=3m²-29m-84