# How do you combine like terms in (2p ^ { 2} + 5p + 11) + ( - p ^ { 2} - 9p - 4)?

Jun 8, 2018

${p}^{2} - 4 p + 7$

#### Explanation:

In short, when we combine terms, we need to look for terms with the same degree. We can rewrite the expression as

$\textcolor{b l u e}{2 {p}^{2} - {p}^{2}} + \textcolor{p u r p \le}{5 p - 9 p} + \textcolor{red}{11 - 4}$

I didn't change the value of the expression, I just grouped the like terms. We can simplify these to get

$\textcolor{b l u e}{{p}^{2}} \textcolor{p u r p \le}{- 4 p} + \textcolor{red}{7}$

Hope this helps!