-x^2 + 1,5x + 2,5 = 0
D = (1.5)^2 - 4 * 2.5 * (-1) = 2.25 + 10 = 12.25
x1 = (-1.5 - 3.5) 2*(-1) = 5/2 = 2.5
x2 = (-1.5+3.5) / 2*(-1) = 2/-2 = -1
-x^2 + 1,5x + 2,5 = 0
D = (1.5)^2 - 4 * 2.5 * (-1) = 2.25 + 10 = 12.25
x1 = (-1.5 - 3.5) 2*(-1) = 5/2 = 2.5
x2 = (-1.5+3.5) / 2*(-1) = 2/-2 = -1