Answer:
-1 + 6i
Step-by-step explanation:
Complex number addition & subtraction:
Subtract/add the imaginary parts and then add real parts.
Open the parenthesis by multiplying the each term of 4 - 2i by (-1)
3 + 4i - (4 - 2i) = 3 + 4i - 4 + 2i
= 3 - 4 + 4i + 2i
= -1 + 6i
