Question
Answer
$$4x+8x^2-8+x^2+7-4x=9x^2-1$$
Explanation
| $$ \begin{aligned}4x+8x^2-8+x^2+7-4x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x^2-1\end{aligned} $$ | |
| ① | Combine like terms: $$ \, \color{blue}{ \cancel{4x}} \,+ \color{green}{8x^2} \color{orange}{-8} + \color{green}{x^2} + \color{orange}{7} \, \color{blue}{ -\cancel{4x}} \, = \color{green}{9x^2} \color{orange}{-1} $$ |
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