(-11 + 6i) - (8 - 5i) =
When subtracting integers the subtraction sign becomes addition and the integers in the second set become their opposites therefore; the equation would change to: (-11 + 6i) + (-8 + 5i) = Combine like terms:
(-11 + -8) + (6i + 5i) =
(-19) + (11i) = -19 + 11i