Question

no universo dos numeros complexos as equaçoes x2+4=0

 

Answer 1

Olá.

x²+4=0
x²= -4
x= √-1 . 4
x= √-1 . √4
x=2i
S: [2i]

√-1= i
√4= 2

Answer 2

$x^{2} + 4 = 0\\\\ x^{2} = -4\\\\ x = \sqrt{-4}\\\\ x = 2i \\\\ \boxed{S = {{2i,-2i}}}$