(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)

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

(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
(1+2i)/(1-i)^2 化简
(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i
(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)

(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
因为i²=-1
所以1-2i+i^2就是1-2i-1