For $$ i=\sqrt{-1}$$ ,what is the sum of $$(7+3i)+(−8+9i)$$?

Question

Uniteasy Admin · Accepted Answer

To add or subtract two complex numbers, just add or subtract the corresponding real and imaginary parts.
Sum of the real parts of $$(7+3i)$$ and $$(−8+9i)$$
$$7+(-8) = -1$$
Sum of the imaginary parts of $$(7+3i)$$ and $$(−8+9i)$$
$$3+9=12$$
The result is $$-1+12i$$
Correct choice is A

Multiple Choice Question (MCQ)

Answer