Question

solução da equaçao x² +2x +5=0 nos conjuntos dos numeros complexos ?

Answer 1

x² + 2x + 5 = 0

Formula de Bhaskara

Δ = b²−4ac
Δ =(2)²−4⋅1⋅5
Δ = 4 − 20
Δ = −16

x = -b ± √Δ / 2x
x = -2 ± √-16 / 2.1
x = -2 ± √16 . i / 2
x = -2 ± 4 . i / 2
x' = -2 - 4.i / 2
x' = -1 -2.i

x'' = -2 - 4.i / 2
x'' = -1 + 2.i

S = {-1 -2i,  -1 + 2i}