Question
Add $ \, \color{blue}{ -7x^2-9x-2 } \, $ and $ \, \color{orangered}{ 9x^2+4x }$.
Answer
$$ \left( \color{blue}{-7x^2-9x-2} \right) + \left( \color{orangered}{9x^2+4x} \right) = 2x^2-5x-2 $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrrr} & -7x^2 & -9x & -2 \\ \color{blue}{ + } & 9x^2 & 4x & \\ \hline \end{array} $$Step 2: Combine like terms (add each column):
$$ \begin{array}{lrrr} & -7x^2 & -9x & -2 \\ \color{blue}{ + } & 9x^2 & 4x & \\ \hline & 2x^2 & -5x & -2 \end{array} $$This page was created using
Polynomial Operations Calculator