Question
Answer
$$3x+5x^2-1+13-20x+x^2=6x^2-17x+12$$
Explanation
| $$ \begin{aligned}3x+5x^2-1+13-20x+x^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6x^2-17x+12\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3x} + \color{red}{5x^2} \color{green}{-1} + \color{green}{13} \color{blue}{-20x} + \color{red}{x^2} = \color{red}{6x^2} \color{blue}{-17x} + \color{green}{12} $$ |
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