Question
Answer
$$4x^2+2x-4x^2-x^3=-x^3+2x$$
Explanation
| $$ \begin{aligned}4x^2+2x-4x^2-x^3& \xlongequal{ } \cancel{4x^2}+2x -\cancel{4x^2}-x^3 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-x^3+2x\end{aligned} $$ | |
| ① | Combine like terms: $$ \, \color{blue}{ \cancel{4x^2}} \,+2x \, \color{blue}{ -\cancel{4x^2}} \,-x^3 = -x^3+2x $$ |
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