Question
Add $ \, \color{blue}{ -5x^2+x+9 } \, $ and $ \, \color{orangered}{ -9x^2+9x }$.
Answer
$$ \left( \color{blue}{-5x^2+x+9} \right) + \left( \color{orangered}{-9x^2+9x} \right) = -14x^2+10x+9 $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrrr} & -5x^2 & x & 9 \\ \color{blue}{ + } & -9x^2 & 9x & \\ \hline \end{array} $$Step 2: Combine like terms (add each column):
$$ \begin{array}{lrrr} & -5x^2 & x & 9 \\ \color{blue}{ + } & -9x^2 & 9x & \\ \hline & -14x^2 & 10x & 9 \end{array} $$This page was created using
Polynomial Operations Calculator