Question
Answer
$$5x^3-9x^2+7+12x^3+7x^2-2=17x^3-2x^2+5$$
Explanation
| $$ \begin{aligned}5x^3-9x^2+7+12x^3+7x^2-2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}17x^3-2x^2+5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{5x^3} \color{red}{-9x^2} + \color{green}{7} + \color{blue}{12x^3} + \color{red}{7x^2} \color{green}{-2} = \color{blue}{17x^3} \color{red}{-2x^2} + \color{green}{5} $$ |
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