Question
Answer
$$-3d^2+2-2-7d^2+d=-10d^2+d$$
Explanation
| $$ \begin{aligned}-3d^2+2-2-7d^2+d& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-10d^2+d\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-3d^2} + \, \color{red}{ \cancel{2}} \, \, \color{red}{ -\cancel{2}} \, \color{blue}{-7d^2} +d = \color{blue}{-10d^2} +d $$ |
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