Question

determine o valor do descriminante x2=2×+5=0

Answer 1

Bom dia!


x² = 2x +5

x² -2x -5 = 0

a = 1

b= -2

c= -5


∆ = b²-4.a.c

∆ = (-2)²-4.1.(-5)

∆ = 4 + 20

∆ = 24


discriminante = 24