Answer:
If the X in the middle is shown as multiplication, then the answer is -15 + 12i
EQUATION: (6 + 2iX6 - 21)
STEP 1:
SPLIT UP THE COMMON FACTORS
a. 6 - 21
b. (2i X 6)
STEP 2:
SOLVE AS SHOWN
a. 6 - 21 = -15
b. 12i
STEP 3:
ADD EVERYTHING TOGETHER
= -15 + 12i
