Question
Answer
$$3y^2(y+y)+y^2+15=6y^3+y^2+15$$
Explanation
| $$ \begin{aligned}3y^2(y+y)+y^2+15& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3y^2\cdot2y+y^2+15 \xlongequal{ } \\[1 em] & \xlongequal{ }6y^3+y^2+15\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{y} + \color{blue}{y} = \color{blue}{2y} $$ |
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