Question

What is the sum of the polynomials?(8x^2-9x^2-4x)+(x^2-3y^2-7x)

Answer 1

-3y² - 11x

Explanation:

`(8x^2-9x^2-4x)+(x^2-3y^2-7x)\\\\=8x^2-9x^2-4x+x^2-3y^2-7x\qquad\text{combine like terms}\\\\=(8x^2-9x^2+x^2)-3y^2+(-4x-7x)\\\\=-3y^2-11x`

Answer 2

-11x-3y^2

Explanation:

(8x^2-9x^2-4x)+(x^2-3y^2-7x)

-x^2-4x+x^2-3y^2-7x

-4x-7x-3y^2

-11x-3y^2