Question

How do you simplify `7xy (x^2 + y) - 11 xy^2 (x^2 -1)`?

Answer 1

By arranging `xy (7x^2 + 18y^2 - 11x^2y)`

Explanation:

Your equation becomes
`7x^3y + 7xy^2 - 11x^3y^2 + 11xy^2`

after getting rid of parantheses

`=7x^3y + 18xy^3 - 11x^3y^2`

Use a common term (xy) to simplify

`=xy (7x^2 + 18y^2 - 11x^2y)`