Question
Answer
$$7b^4+5b^3b\cdot4=27b^4$$
Explanation
| $$ \begin{aligned}7b^4+5b^3b\cdot4& \xlongequal{ }7b^4+20b^4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}27b^4\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7b^4} + \color{blue}{20b^4} = \color{blue}{27b^4} $$ |
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