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Complex Numbers
hard
0:00.0
Solve
z
2
=
−
16
z^2 = -16
z
2
=
−
16
and find the sum of all roots.
A
−
4
i
-4i
−
4
i
B
8
i
8i
8
i
C
0
0
0
D
4
i
4i
4
i
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