Question
Answer
$$3y^2-7y+1-y^2+2y-9=2y^2-5y-8$$
Explanation
| $$ \begin{aligned}3y^2-7y+1-y^2+2y-9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2y^2-5y-8\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3y^2} \color{red}{-7y} + \color{green}{1} \color{blue}{-y^2} + \color{red}{2y} \color{green}{-9} = \color{blue}{2y^2} \color{red}{-5y} \color{green}{-8} $$ |
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