Question
Answer
$$9x^2+6x-2+x^2-9x-1=10x^2-3x-3$$
Explanation
| $$ \begin{aligned}9x^2+6x-2+x^2-9x-1& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}10x^2-3x-3\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{9x^2} + \color{red}{6x} \color{green}{-2} + \color{blue}{x^2} \color{red}{-9x} \color{green}{-1} = \color{blue}{10x^2} \color{red}{-3x} \color{green}{-3} $$ |
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