2i/(1-i);(6)[(√5+√3i)/(√5-√3i)]-[(√3+√5i)/(√3-√5i)]

2i/(1-i);(6)[(√5+√3i)/(√5-√3i)]-[(√3+√5i)/(√3-√5i)]
【正确答案】:-1+i;