Question

Помогите разложить на множители

Answer 1

$-20x^6y-35x^6=-5x^6(4y-6)$
$12x^2+6y-2x^2y-y^2=2x^2(6-y)+y(6-y)=(2x^2+y)(6-y)$
$a^3b-25ab^3=ab(a^2-25b^2)=ab(a-5b)(a+5b)$

Answer 2

2) = -5x^6(4y+7)
3) = 2x^2(6-y)+y(6-y)=(2x^2+y)(6-y)
4) = ab (a^2-25b^2)= ab(a-5b)(a+5b)