Solve for z_3
z_{3}=-236+296i
Assign z_3
z_{3}≔-236+296i
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z_{3}=\left(-7-2i\right)\left(20-48i\right)
Calculate 6-4i to the power of 2 and get 20-48i.
z_{3}=-236+296i
Multiply -7-2i and 20-48i to get -236+296i.
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