Question

Subtract the sum of xy(− x − y −1) and (xy x y) 2 2 − from ( ) 2 2 4x xy −

Answer 1

6x + 6y -xy + x^y + xy^2

Explanation:

• Sum of xy (-x - y -1) & 2 (xy + x + y)

[ xy (-x - y -1) ] + 2 (xy + x + y)

-x^2y - xy^2 - xy + 2xy + 2x + 2y

2x + 2y + xy - x^y - xy^2

• Subtract from 2 (4x + 4y) , ie 8x + 8y

8x + 8y - (2x + 2y + xy - x^2y - xy^2)

8x + 8y - 2x - 2y -xy + x^y + xy^2

6x + 6y -xy + x^y + xy^2