Question

subtract: 9b^3 - (-11b^3 + 2)
your answer should be in simplest terms.
enter the correct answer.

Explanation:

Step1: Remove the parentheses

When we have $9b^{3}-(- 11b^{3}+2)$, we distribute the negative sign. A negative times a negative is a positive and a negative times a positive is a negative. So it becomes $9b^{3}+11b^{3}-2$.
$9b^{3}+11b^{3}-2$

Step2: Combine like - terms

The terms $9b^{3}$ and $11b^{3}$ are like - terms. We add the coefficients of like - terms. The coefficient of $9b^{3}$ is 9 and the coefficient of $11b^{3}$ is 11. So $(9 + 11)b^{3}-2=20b^{3}-2$.
$(9 + 11)b^{3}-2=20b^{3}-2$

Answer:

$20b^{3}-2$