Question
Answer
$$3x^2+4x-2x^2+8x+5=x^2+12x+5$$
Explanation
| $$ \begin{aligned}3x^2+4x-2x^2+8x+5& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x^2+12x+5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3x^2} + \color{red}{4x} \color{blue}{-2x^2} + \color{red}{8x} +5 = \color{blue}{x^2} + \color{red}{12x} +5 $$ |
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