Question

Resolva a equação x² - 10x - 5 =0

Answer 1

a=1

b=-10

c=-5

Δ=b²-4ac

Δ=(-10)²-4.1.(-5)

Δ=100+20

Δ=120

x= -b-+√120/2a

x=10+-√120/2

xi= 5+√120

xl=5-√120