(1+2i)/(1-2i)=

题目详情

(1+2i)/(1-2i)=

▼优质解答

答案和解析

(1+2i)/(1-2i)
=(1+2i)²/[(1-2i)(1+2i)]
=(1+4i-4)/(1+4)
=(-3+4i)/5
=(-3/5) +(4/5)i

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