Question

dados: z3=1+1/2i e z4=3/4-i, ache o valor de:

2.z3-3i.z4

Answer 1

$z_3 = 1 + \frac{1}{2}i \\ z_4 = \frac{3}{4}-i \\ 2z_3-3iz_4 = \\ 2+i - 3i(\frac{3}{4}-i)= \\ 2+i -\frac{9}{4}i+3i^2= \\ 2 -\frac{5}{4}i-3 = -\frac{5}{4}i - 1$