Question
Answer
$$8b^2+3b^3-(2b^2-2)=3b^3+6b^2+2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}8b^2+3b^3-(2b^2-2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8b^2+3b^3-2b^2+2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3b^3+6b^2+2\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2b^2-2 \right) = -2b^2+2 $$ |
| ② | Combine like terms: $$ \color{blue}{8b^2} +3b^3 \color{blue}{-2b^2} +2 = 3b^3+ \color{blue}{6b^2} +2 $$ |
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