Subtract polynomials: $ \, \color{blue}{ 7y+1 } \, $ , $ \, \color{orangered}{ 3y+1 }$.
Answer
$$ \left( \color{blue}{7y+1} \right) - \left( \color{orangered}{3y+1} \right) = 4y $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrr} & 7y & 1 \\ \color{red}{ - } & 3y & 1 \\ \hline \end{array} $$Step 2: Change ALL the signs in the second row.
$$ \begin{array}{lrr} & 7y & 1 \\ \color{red}{ - } & -3y & -1 \\ \hline \end{array} $$Step 3: Combine like terms (add each column):
$$ \begin{array}{lrr} & 7y & 1 \\ \color{red}{ - } & -3y & -1 \\ \hline & 10y & 2 \end{array} $$This page was created using
Polynomial Operations Calculator