Question
Answer
$$2x-5x^4+7x-3x^4=-8x^4+9x$$
Explanation
| $$ \begin{aligned}2x-5x^4+7x-3x^4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-8x^4+9x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2x} \color{red}{-5x^4} + \color{blue}{7x} \color{red}{-3x^4} = \color{red}{-8x^4} + \color{blue}{9x} $$ |
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