Easy
If Z1=−3−3iZ_1=-3-3 iZ1=−3−3i and Z2=3−3iZ_2=3-3 iZ2=3−3i, then the value of Z1+Z2Z_1+Z_2Z1+Z2 is
−6i-6 i−6i
6i6i6i
111
2i2 i2i
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