Tap the blue circles to see an explanation.
$$ \begin{aligned}\sqrt{5-2}^2+(0+4)^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\sqrt{5-2}^2+4^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}\sqrt{5-2}^2+16\end{aligned} $$ | |
① | Combine like terms |
② | $ 4 ^ 2 = 16 $ |