Add $ \, \color{blue}{ x^3+4x } \, $ and $ \, \color{orangered}{ x+9 }$.
Answer
$$ \left( \color{blue}{x^3+4x} \right) + \left( \color{orangered}{x+9} \right) = x^3+5x+9 $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrrr} & x^3 & 4x & \\ \color{blue}{ + } & & x & 9 \\ \hline \end{array} $$Step 2: Combine like terms (add each column):
$$ \begin{array}{lrrr} & x^3 & 4x & \\ \color{blue}{ + } & & x & 9 \\ \hline & x^3 & 5x & 9 \end{array} $$This page was created using
Polynomial Operations Calculator