Question
Subtract polynomials: $ \, \color{blue}{ 5n+8 } \, $ , $ \, \color{orangered}{ 2n-1 }$.
Answer
$$ \left( \color{blue}{5n+8} \right) - \left( \color{orangered}{2n-1} \right) = 3n+9 $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrr} & 5n & 8 \\ \color{red}{ - } & 2n & -1 \\ \hline \end{array} $$Step 2: Change ALL the signs in the second row.
$$ \begin{array}{lrr} & 5n & 8 \\ \color{red}{ - } & -2n & 1 \\ \hline \end{array} $$Step 3: Combine like terms (add each column):
$$ \begin{array}{lrr} & 5n & 8 \\ \color{red}{ - } & -2n & 1 \\ \hline & 7n & 7 \end{array} $$This page was created using
Polynomial Operations Calculator