Question
Answer
$$2x^3+8x^2-6x+8+x^3-3x-9=3x^3+8x^2-9x-1$$
Explanation
| $$ \begin{aligned}2x^3+8x^2-6x+8+x^3-3x-9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^3+8x^2-9x-1\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2x^3} +8x^2 \color{red}{-6x} + \color{green}{8} + \color{blue}{x^3} \color{red}{-3x} \color{green}{-9} = \color{blue}{3x^3} +8x^2 \color{red}{-9x} \color{green}{-1} $$ |
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