Which shows the correct substitution of the values a, b, and c from the equation 0 = - 3x2 - 2x + 6 into the quadratic formula? Quadratic formula: x =

Hello:

the discriminat of each quadratic equation : ax²+bx+c=0 ... (a ≠ 0) is:

Δ = b² - 4ac

1) Δ > 0 the equation has two reals solutions : x = (-b±√Δ) / 2a

2) Δ = 0 : one solution : x = - b/2a

3) Δ < 0 : no reals solutions

in this exercice : - 3x²-2x+6 = 0 ... a = - 3 b = - 2 c = 6

calculate : Δ ...