Add $ \, \color{blue}{ 8x^3+26x^2+13x-21 } \, $ and $ \, \color{orangered}{ 2x+5 }$.
Answer
$$ \left( \color{blue}{8x^3+26x^2+13x-21} \right) + \left( \color{orangered}{2x+5} \right) = 8x^3+26x^2+15x-16 $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrrrr} & 8x^3 & 26x^2 & 13x & -21 \\ \color{blue}{ + } & & & 2x & 5 \\ \hline \end{array} $$Step 2: Combine like terms (add each column):
$$ \begin{array}{lrrrr} & 8x^3 & 26x^2 & 13x & -21 \\ \color{blue}{ + } & & & 2x & 5 \\ \hline & 8x^3 & 26x^2 & 15x & -16 \end{array} $$This page was created using
Polynomial Operations Calculator