Question
Answer
$$3x^3+4x^2-(10x+3x^2)=3x^3+x^2-10x$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}3x^3+4x^2-(10x+3x^2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^3+4x^2-10x-3x^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3x^3+x^2-10x\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 10x+3x^2 \right) = -10x-3x^2 $$ |
| ② | Combine like terms: $$ 3x^3+ \color{blue}{4x^2} -10x \color{blue}{-3x^2} = 3x^3+ \color{blue}{x^2} -10x $$ |
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