Question

pls tell answer with proper explain I will mark you as brainlist​

Answer 1

Answer:

1)7a^3b(-a+b) -7a^2b^2(-a+b) -9ab^3(-a+b) -3b^4(-a+b)

=-7a^4b^2+7a^3b^3 +9a^2b^4+3ab^5

2)6x^5y(2x-7) -7x^4y^2(2x-7)+3xy^3(2x-7)-8y(2x-7)

=12x^6y-42x^5y-14x^5y^2+49x^4y^2+6x^2y^3-21xy^3-16xy+56y