Question
Answer
$$4x^2+7x^3-9x^3+15x=-2x^3+4x^2+15x$$
Explanation
| $$ \begin{aligned}4x^2+7x^3-9x^3+15x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-2x^3+4x^2+15x\end{aligned} $$ | |
| ① | Combine like terms: $$ 4x^2+ \color{blue}{7x^3} \color{blue}{-9x^3} +15x = \color{blue}{-2x^3} +4x^2+15x $$ |
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