Question
Answer
$$7y^3+6y^2+2y+1+6y^3+7y^2-y+6=13y^3+13y^2+y+7$$
Explanation
| $$ \begin{aligned}7y^3+6y^2+2y+1+6y^3+7y^2-y+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}13y^3+13y^2+y+7\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7y^3} + \color{red}{6y^2} + \color{green}{2y} + \color{orange}{1} + \color{blue}{6y^3} + \color{red}{7y^2} \color{green}{-y} + \color{orange}{6} = \\ = \color{blue}{13y^3} + \color{red}{13y^2} + \color{green}{y} + \color{orange}{7} $$ |
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