Tap the blue circles to see an explanation.
| $$ \begin{aligned}r((2-5)^2+3^2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}r((-3)^2+3^2) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}r\cdot(9+9) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}r\cdot18\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2} \color{blue}{-5} = \color{blue}{-3} $$ |
| ② | 2-5=-32-5=-3 |
| ③ | Combine like terms: $$ \color{blue}{9} + \color{blue}{9} = \color{blue}{18} $$ |