Tap the blue circles to see an explanation.
$$ \begin{aligned}y-5-(7y^2-6y)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}y-5-7y^2+6y \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-7y^2+7y-5\end{aligned} $$ | |
① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 7y^2-6y \right) = -7y^2+6y $$ |
② | Combine like terms: $$ \color{blue}{y} -5-7y^2+ \color{blue}{6y} = -7y^2+ \color{blue}{7y} -5 $$ |