Q. 13 - Intermediate Algebra

Question

In the following exercises, add or subtract the monomials.

$7x^2+5x^2+4a-9a$

Step-by-Step Solution

Answer

On simplifying the expression, we get $12x^2-5a$

Step 1. Given information

$\begin{array}{l}\text{The given expression is}\\ 7x^2+5x^2+4a-9a\\ \text{We have to add or subtract the given expression as applicable.}\end{array}$

Step 2. Simplify

$\begin{array}{l}\text{Consider the given expression}\\ \Rightarrow 7x^2+5x^2+4a-9a=\left(7+5\right)x^2+\left(4-9\right)a\\ =12x^2-5a\end{array}$