$$ \begin{aligned}\frac{1}{2sqrt\cdot2\cdot(1+i)}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{1}{4qrst+4iqrst}\end{aligned} $$ | |
① | Multiply $ \color{blue}{4qrst} $ by $ \left( 1+i\right) $ $$ \color{blue}{4qrst} \cdot \left( 1+i\right) = 4qrst+4iqrst $$ |