Subtract polynomials: $ \, \color{blue}{ -9x^2-2x } \, $ , $ \, \color{orangered}{ -9x^2-3x }$.
Answer
$$ \left( \color{blue}{-9x^2-2x} \right) - \left( \color{orangered}{-9x^2-3x} \right) = x $$
Explanation
Step 1: Write second polynomial below the first one. Making sure like terms are lined up.
$$ \begin{array}{lrr} & -9x^2 & -2x \\ \color{red}{ - } & -9x^2 & -3x \\ \hline \end{array} $$Step 2: Change ALL the signs in the second row.
$$ \begin{array}{lrr} & -9x^2 & -2x \\ \color{red}{ - } & 9x^2 & 3x \\ \hline \end{array} $$Step 3: Combine like terms (add each column):
$$ \begin{array}{lrr} & -9x^2 & -2x \\ \color{red}{ - } & 9x^2 & 3x \\ \hline & -18x^2 & -5x \end{array} $$This page was created using
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