Question
Answer
$$-7q^2+13q-5-(2q^2+10)=-9q^2+13q-15$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-7q^2+13q-5-(2q^2+10)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-7q^2+13q-5-2q^2-10 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-9q^2+13q-15\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2q^2+10 \right) = -2q^2-10 $$ |
| ② | Combine like terms: $$ \color{blue}{-7q^2} +13q \color{red}{-5} \color{blue}{-2q^2} \color{red}{-10} = \color{blue}{-9q^2} +13q \color{red}{-15} $$ |
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