Question

Dados os complexos u=2+3i,v=-5i e w=-1-2i,calcule

a) u+ v + w
b) (u-i) + (v-w)
c) v-w+u

Please help me :)

Answer 1

a) u+ v + w = 2 + 3i - 5i  -1 - 2i = 1 - 4i

b) (u-i) + (v-w) =   2 + 3i - i - 5i + 1 + 2i = 3 - i

c) v-w+u = -5i +1 + 2i + 2 + 3i = 3