Add or subtract.
-7i + (-9 - i)
A) 9 - 6i
B) 9 - 8i
C) -9 + 6i
D) -9 + 8i

Name: Add or subtract. -7i + (-9 - i) A) 9 - 6i B) 9 - 8i C) -9 + 6i D) -9 + 8i
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Question

Quizplus · Accepted Answer

When adding or subtracting complex numbers, we add or subtract the real parts separately from the imaginary parts. In this case, the real part is -9 and there is only one imaginary term, 7i - i = 6i. Therefore, we have -9 + 6i, which matches choice C.

Add or Subtract. -7i + (-9 - I)