Question

Resolva a equação
X²+2x-5=0

Answer 1

a 1 b -2 c 5
del=b2-4ac
del=(-2)2 -4.1.5
del=4-20
del= -16

nao existe soluçao

Answer 2

Δ=b²-4ac
Δ=2=2²-4*1*(-5)
Δ=4+20
Δ=24

x=(-b+-√Δ)/2a
x=(-2+-2√6)/2
x1=-1+√6
x2=-1-√6