Write in Standard Form (-2x^4+7x^2y-7)+(-9x^3+7xy+7)

$(- 2 x^{4} + 7 x^{2} y - 7) + (- 9 x^{3} + 7 x y + 7)$

Step 1

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Step 2

Combine the opposite terms in $- 2 x^{4} + 7 x^{2} y - 7 - 9 x^{3} + 7 x y + 7$ .

Add $- 7$ and $7$ .

$- 2 x^{4} + 7 x^{2} y - 9 x^{3} + 7 x y + 0$

Add $- 2 x^{4} + 7 x^{2} y - 9 x^{3} + 7 x y$ and $0$ .

$- 2 x^{4} + 7 x^{2} y - 9 x^{3} + 7 x y$