Question

6x²-x-2=0 resolva essa equacao de segundo grau

Answer 1

6x²-x-2=0

a = 6
b = -1
c = -2

Δ = b² -4 .a .c 

Δ = (-1)² -4 . 6 . (-2)
Δ = 1 - 24 . (-2)
Δ = 1 + 48
Δ = 49

-b +- √Δ   /2.a

-(-1) +- √49   /2 . 6
1 +-  7    / 12

x' = 1 + 7  /12
x' = 8/12    ÷4
x' = 2/3

x'' = 1 - 7  /12
x'' = -6  /12  ÷6
x'' = -1/2 

Resposta : S{ -1/2 , 2/3}