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Question Number 61886 by aliesam last updated on 10/Jun/19

$$a+bi=\frac{2+i}{1-i}$$$$find$$$$2(a^2+b^2)$$

Answered by MJS last updated on 10/Jun/19

$$\frac{2+\mathrm{i}}{1-\mathrm{i}}=\frac{1}{2}+\frac{3}{2}\mathrm{i}$$$$2(a^2+b^2)=5$$

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