Question
Answer
$$15x^2-3x^2-13=12x^2-13$$
Explanation
| $$ \begin{aligned}15x^2-3x^2-13& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}12x^2-13\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{15x^2} \color{blue}{-3x^2} -13 = \color{blue}{12x^2} -13 $$ |
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