Question

ALGUEM ME AJUDA URGENTEEEEEEE x² - 4x - 5 = 0

Answer 1

Resposta:

x²-4x-5=0

∆=(b)²-4.a.c

∆=(-4)²--4.1.(-5)

∆=16+20

∆=36

x=-b±√∆/2.a

x4±6/2

x¹=5

x²= -1