Question
Answer
$$6r^4-5+7r^3-5r^4=r^4+7r^3-5$$
Explanation
| $$ \begin{aligned}6r^4-5+7r^3-5r^4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}r^4+7r^3-5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{6r^4} -5+7r^3 \color{blue}{-5r^4} = \color{blue}{r^4} +7r^3-5 $$ |
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