Question

PLEASE EMERGENCY I HAVE ONLINE EXAM tmro​

Answer 1

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$⟹( \frac{a + ib}{a - ib} )^{2} - ( \frac{a - ib}{a + ib})^{2} \\ ⟹( \frac{a + b^{2} i}{a - bi}) - ( \frac{a - b^{2}i }{a + bi} ) \\ ⟹\frac{(a + bi)(a + b ^{2} i) - (a - bi)(a - b^{2}i }{(a - bi)(a + bi)} \\ ⟹ \frac{2ab^{2}i + 2ab }{a ^{2} + b ^{2} } \\ ⟹\frac{(2ab^{2} + 2ab)i }{a ^{2} + b {}^{2} }$

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