Question

(UFBA) Sendo a = -2 + 3i , b = 3 - 6i e c = 2 - 3i , o valor de ac + b é:

Answer 1

ac+b=(-2+3i)×(2-3i)+3-6i

ac+b=-4-9i²+3-6i

ac+b=-9i²-6i-1

i²=-1

ac+b=9-6i-1=8-6i

ac+b=8-6i