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