Question
Answer
$$x^3-3x^2+4x+7+2x^3-6x^2-x+6=3x^3-9x^2+3x+13$$
Explanation
| $$ \begin{aligned}x^3-3x^2+4x+7+2x^3-6x^2-x+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^3-9x^2+3x+13\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x^3} \color{red}{-3x^2} + \color{green}{4x} + \color{orange}{7} + \color{blue}{2x^3} \color{red}{-6x^2} \color{green}{-x} + \color{orange}{6} = \\ = \color{blue}{3x^3} \color{red}{-9x^2} + \color{green}{3x} + \color{orange}{13} $$ |
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