Answer
$$2x^5+2x^3-(7x^3+6x^2)=2x^5-5x^3-6x^2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2x^5+2x^3-(7x^3+6x^2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x^5+2x^3-7x^3-6x^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}2x^5-5x^3-6x^2\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 7x^3+6x^2 \right) = -7x^3-6x^2 $$ |
| ② | Combine like terms: $$ 2x^5+ \color{blue}{2x^3} \color{blue}{-7x^3} -6x^2 = 2x^5 \color{blue}{-5x^3} -6x^2 $$ |
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