Question

Dados os números complexos Z=5 +10i, Q= 3- 2i e W= 4-i, calcule :

a) Z.Q
b) Z.W
c)Q.W

Answer 1

A) Z.Q = (5 +10i)(3 - 2i) = 15 - 10i + 30i - 20i² = 15 + 20i + 20 = 35 + 20i

B) Z.W = (5 + 10i)(4 - i) = 20 - 5i + 40i -10i² = 20 + 35i + 10 = 30 + 35i

C) Q.W = (3 - 2i)(4 - i) = 12 - 3i - 8i + 2i² = 12 - 11i - 2 = 10 - 11i