Single Answer MCQ
Q-00051683
If z1 = 3 + 4i and z2 = 1 - 2i, what is z1 * z2?
1
11 + 10i
2
11 - 10i
3
-11 - 10i
4
-11 + 10i
Answer and Solution
Answer
A. 11 + 10i
Solution:
z1 * z2 = (3)(1) + (3)(-2i) + (4i)(1) + (4i)(-2i) = 3 - 6i + 4i - 8 = -5 - 2i.
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