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