What is the solutions of the quadratic equation?

x2 = 9x + 6

Hello:

note:

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:

x² = 9x+6

x² - 9x - 6 = 0

Δ = b² - 4ac ... a = 1 b = - 9 c = - 6

Δ = (-9) ² - 4 (1) (-6) = 105 ...

He continued ...