Simplify $(3 + 2i) + (1 - 5i)$.
A$4 + 7i$
B$2 + 7i$
C$4 - 3i$CORRECT
D$4 - 7i$
JUPEBMathematicsComplex Numbers
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Why the answer is C, and why the others tempt you.
Add the real parts and the imaginary parts separately: $(3 + 1) + (2 - 5)i = 4 - 3i$. Adding $2i$ and $5i$ instead of subtracting gives $4 + 7i$.
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