Question
Answer
$$9y^3-y^2+4y+7-4y^3+11y^2-7y+5=5y^3+10y^2-3y+12$$
Explanation
| $$ \begin{aligned}9y^3-y^2+4y+7-4y^3+11y^2-7y+5& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5y^3+10y^2-3y+12\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{9y^3} \color{red}{-y^2} + \color{green}{4y} + \color{orange}{7} \color{blue}{-4y^3} + \color{red}{11y^2} \color{green}{-7y} + \color{orange}{5} = \\ = \color{blue}{5y^3} + \color{red}{10y^2} \color{green}{-3y} + \color{orange}{12} $$ |
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