Question

2- Resolva por delta : 3x² - x -2=0 ​

Answer 1

a = 3 b = -1 c = -2

Δ = B² - 4.A.C

Δ = (-1)² - 4.3.(-2)

Δ = 1 + 24

Δ = 25

X = -B +- √Δ / 2.A

X = -(-1) +- √25 / 2.3

X = 1 +- 5 / 6

X| = 1 + 5 / 6

X| = 6 / 6

X| = 1

X|| = 1 - 5 / 6

X|| = -4 / 6

Answer 2

Explicação passo-a-passo:

3x² - x -2=0 

a=3

b=-1

c=-2

∆=b^2-4ac

∆=(-1)^2-4×3×-2

∆=1+24

∆=25

-b±√∆/2a

1±√25/2×3

1±5/6

x¹=1+5/6=6/6=>1

x²=1-5/6=-4÷2/6÷2=>-2/3