Question
Answer
$$6+6x^4-(4x^4+7)=2x^4-1$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}6+6x^4-(4x^4+7)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6+6x^4-4x^4-7 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}2x^4-1\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 4x^4+7 \right) = -4x^4-7 $$ |
| ② | Combine like terms: $$ \color{blue}{6} + \color{red}{6x^4} \color{red}{-4x^4} \color{blue}{-7} = \color{red}{2x^4} \color{blue}{-1} $$ |
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