Question
Answer
$$\dfrac{a+bi+a-bi}{1+a-bi}=\dfrac{2a}{1+a-bi}$$
Explanation
| $$ \begin{aligned}\frac{a+bi+a-bi}{1+a-bi}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{2a}{1+a-bi}\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{a} + \, \color{red}{ \cancel{bi}} \,+ \color{blue}{a} \, \color{red}{ -\cancel{bi}} \, = \color{blue}{2a} $$ |
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