a = 0.64, b = 2, c = -2.5
D = b^2 - 4aD = 2^2 - 40.64(-2.5D = 4 + 1D = 14
a = -5, b = 2, c = -2.5
D = b^2 - 4aD = 2^2 - 4(-5)(-2.5D = 4 - 5D = -46
a = 0.64, b = 2, c = -2.5
D = b^2 - 4a
Для уравнения -5x^2 + 2x - 2.5 = 0:D = 2^2 - 40.64(-2.5
D = 4 + 1
D = 14
a = -5, b = 2, c = -2.5
D = b^2 - 4a
D = 2^2 - 4(-5)(-2.5
D = 4 - 5
D = -46