Question
Answer
$$4r-5r^3+3r^4+2r^3=3r^4-3r^3+4r$$
Explanation
| $$ \begin{aligned}4r-5r^3+3r^4+2r^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3r^4-3r^3+4r\end{aligned} $$ | |
| ① | Combine like terms: $$ 4r \color{blue}{-5r^3} +3r^4+ \color{blue}{2r^3} = 3r^4 \color{blue}{-3r^3} +4r $$ |
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