Question
Answer
$$-(mn)^2+4n+2mn^2+2m^2n^2=m^2n^2+2mn^2+4n$$
Explanation
| $$ \begin{aligned}-(mn)^2+4n+2mn^2+2m^2n^2& \xlongequal{ }-m^2n^2+4n+2mn^2+2m^2n^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}m^2n^2+2mn^2+4n\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-m^2n^2} +4n+2mn^2+ \color{blue}{2m^2n^2} = \color{blue}{m^2n^2} +2mn^2+4n $$ |
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