Answer
$$11y^2+10y-9y^2-8y+5y^0=2y^2+2y+5$$
Explanation
| $$ \begin{aligned}11y^2+10y-9y^2-8y+5y^0& \xlongequal{ }11y^2+10y-9y^2-8y+5 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2y^2+2y+5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{11y^2} + \color{red}{10y} \color{blue}{-9y^2} \color{red}{-8y} +5 = \color{blue}{2y^2} + \color{red}{2y} +5 $$ |
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