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