Question

what is the simplified expression of the following polynomial: xy4 + 5y7 - (6xy + 7y7) - x8y2 + (-3xy4)

Answer 1

This polynomial would simplified as: -2y^7-2xy^4-x^8y^2-6xy (I'm assuming you meant to square the answers)

If you didn't the answer would be: -30xy-14y

But I'm pretty sure you meant to put the first one!

Answer 2

`(-2y^(7)-2xy^(4)-x^(8) y^(2)-6xy)`

Explanation:

The given expression is
`xy^(4)+5y^(7)-(6xy-7y^(7))-x^(8)y^(2)(-3xy^(4))`

We have to simplify the given expression.

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

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

`-2xy^(4)-2y^(7)-6xy-x^(8) y^(2)`

`-2xy^(4)-2y^(7)-6xy-x^(8)y^(2)`

Therefore, simplified form of the expression will be

`(-2y^(7)-2xy^(4)-x^(8) y^(2)-6xy)`