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Complex Numbers
hard
0:00.0
Find
∣
z
∣
|z|
∣
z
∣
if
z
=
(
3
+
4
i
)
(
1
−
i
)
z = (3+4i)(1-i)
z
=
(
3
+
4
i
)
(
1
−
i
)
.
A
5
2
5\sqrt{2}
5
2
B
7
7
7
C
10
10
10
D
5
\sqrt{5}
5
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