Question

What is the polynomial 3y^2+(y+7)^2-15 after it has be simplified

Answer 1

4y^(2)+14y+31

Explanation:

First you need to do (y+7)(y+7)

y^2+7y+7y+49

y^2+14y+49

Add it all together

y^2+14y+49+3y^2-15

4y^(2)+14y+31