Question

How do you multiply `(x^2-7y)^2`?

Answer 1

#x^4 - 14yx^2 + 49y^2

Explanation:

`(x^2 - 7y)^2 =>`

`(x^2 - 7y)(x^2 - 7y) =>`

`x^2x^2 - x^2(7y) - x^2(7y) + 7y7y =>`

`x^4 - 2*(7yx^2) + 49y^2 =>`

`x^4 - 14yx^2 + 49y^2`