Question

combine like terms. - 9y^{2}+x^{3}-4x^{3}-6y^{2}+5 - 2 - x^{3}

Explanation:

Step1: Combine $x^3$ terms

$x^3-4x^3 - x^3=(1 - 4-1)x^3=-4x^3$

Step2: Combine $y^2$ terms

$-y^2-6y^2=(-1 - 6)y^2=-7y^2$

Step3: Combine constant terms

$5 - 2 = 3$

Answer:

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