Question

Considere os números complexos z = 2 - i, w = 3+2i e r = 3 - 2i. Calcule o valor de z - 2w - r

Answer 1

Resposta:

$z=2-y\\w=3+2i\\r=3-2i$

$z-2w-r=\\ =(2-i)-2(3+2i)-(3-2i)\\=2-i-6-4i-3+2i\\=2-6-3-i-4i+2i\\=-7-3i$