Question
Answer
$$-3x+11x^2-(x^2+11)=10x^2-3x-11$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-3x+11x^2-(x^2+11)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-3x+11x^2-x^2-11 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}10x^2-3x-11\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( x^2+11 \right) = -x^2-11 $$ |
| ② | Combine like terms: $$ -3x+ \color{blue}{11x^2} \color{blue}{-x^2} -11 = \color{blue}{10x^2} -3x-11 $$ |
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