Add or subtract the complex numbers
-$(2+2 \mathrm{i})-(6+9 \mathrm{i})+(8+9 \mathrm{i})$
A) $-12-16 \mathrm{i}$
B) $-12+2 \mathrm{i}$
C) $4+2 \mathrm{i}$
D) $4+20 \mathrm{i}$

Name: Add or subtract the complex numbers -$(2+2 \mathrm{i})-(6+9 \mathrm{i})+(8+9 \mathrm{i})$ A) $-12-16 \mathrm{i}$ B) $-12+2 \mathrm{i}$ C) $4+2 \mathrm{i}$ D) $4+20 \mathrm{i}$
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Question

Quizplus · Accepted Answer

First, combine like terms: real parts with real parts and imaginary parts with imaginary parts. (2 - 6 + 8) + (2i - 9i + 9i) = 4 + 2i.

Add or Subtract the Complex Numbers - (2+2i)−(6+9i)+(8+9i)(2+2 \mathrm{i})-(6+9 \mathrm{i})+(8+9 \mathrm{i})(2+2i)−(6+9i)+(8+9i)

Add or Subtract the Complex Numbers
- $(2+2 \mathrm{i})-(6+9 \mathrm{i})+(8+9 \mathrm{i})$