Easy
If Z1=−7+5iZ_1=-7+5 iZ1=−7+5i and Z2=−7−3iZ_2=-7-3 iZ2=−7−3i, then the value of Z1−Z2Z_1-Z_2Z1−Z2 is
8i8 i8i
−8i-8 i−8i
7i7 i7i
−7i-7 i−7i
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