x2−5x+6=0, x2−5x+6=0, x = -2, x = -3, x = 1, x = 6, Nessuna soluzione, Quanto vale il discriminante dell’equazione 2x^2 + 4x - 3 = 0 ?, A) 16, B) 24, C) 40, D) 8,  Quale delle seguenti equazioni ha una sola soluzione reale?, A) x^2 - 9 = 0, B) x^2 + 4x + 4 = 0, C) x^2 + 1 = 0, D) x^2 - 2x - 3 = 0, Quale delle seguenti è la soluzione dell’equazione x^2 - 5x + 6 = 0 ?, A) x = 2 e x = 3, B) x = -2 e x = -3, C) x = 1 e x = 6, D) x = -1 e x = -6.

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