Question
Answer
$$6x^3+18x-x^2-3x^3=3x^3-x^2+18x$$
Explanation
| $$ \begin{aligned}6x^3+18x-x^2-3x^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^3-x^2+18x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{6x^3} +18x-x^2 \color{blue}{-3x^3} = \color{blue}{3x^3} -x^2+18x $$ |
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