Question
Answer
$$5a^4-6a^3-(4a^4+8a^3)=a^4-14a^3$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}5a^4-6a^3-(4a^4+8a^3)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5a^4-6a^3-4a^4-8a^3 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}a^4-14a^3\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 4a^4+8a^3 \right) = -4a^4-8a^3 $$ |
| ② | Combine like terms: $$ \color{blue}{5a^4} \color{red}{-6a^3} \color{blue}{-4a^4} \color{red}{-8a^3} = \color{blue}{a^4} \color{red}{-14a^3} $$ |
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