Question

3x²-2x-8=0 como faço essa equação

Answer 1

Delta=b²-4.a.c
delta=4-4.3.(-8)
delta=100

x=2+-10/6
x1=2
x2=-8/6

Answer 2

formula de baskara               Δ=b²-4ac                                   x=-b+ √Δ/2a

a=3                                        Δ=(-2)²-4(3)(-8)                         x=[-(-2)+√100]/2(3)

b=-2                                       Δ=4+96                                     x=[2 +10]/6=2

c=-8                                       Δ=100                                       x=[2-10]/6= -8/6=-2/3

 resposta : x=  2 e -2/3