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