Question
Answer
$$8r^4-4r^3+8r^3+8r\cdot4=8r^4+4r^3+32r$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}8r^4-4r^3+8r^3+8r\cdot4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8r^4-4r^3+8r^3+32r \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8r^4+4r^3+32r\end{aligned} $$ | |
| ① | $$ 8 r \cdot 4 = 32 r $$ |
| ② | Combine like terms: $$ 8r^4 \color{blue}{-4r^3} + \color{blue}{8r^3} +32r = 8r^4+ \color{blue}{4r^3} +32r $$ |
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