Answer
$$4y^2-2y-5+y^2-7y+6=5y^2-9y+1$$
Explanation
| $$ \begin{aligned}4y^2-2y-5+y^2-7y+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5y^2-9y+1\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{4y^2} \color{red}{-2y} \color{green}{-5} + \color{blue}{y^2} \color{red}{-7y} + \color{green}{6} = \color{blue}{5y^2} \color{red}{-9y} + \color{green}{1} $$ |
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