Question

resolver a equaçao x2+4x+5=0 dando a resposta em €​

Answer 1

x² + 4x + 5 = 0

∆ = b² - 4.a.c

∆ = 4² - 4.1.5

∆ = 16 - 20

∆ = -4

x = -b ± √∆ /2.a

x = -4 ± √-4 /2.1

x = -4 ± 2i / 2

x' = -2 + i

x" = -2 - i