Your number is -7.
-7 x -4 = (positive) 28
28-20 = 8
Answer:
-2 +2i
Step-by-step explanation:
Treat "i" as you would any variable and collect terms in the usual way. Conventionally, complex numbers are written with the imaginary part second.
= i(6 -4) +(-7 +5) = -2 +2i
It might be 150 if u divide by 2 but I’m not sure