>>> from quadratic import has_real_roots

(x-1)(x-3) = x²-4x+3

>>> a, b, c = 1, -4, 3
>>> r = has_real_roots(a, b, c)
>>> r
True

>>> a, b, c = 2, -4, 3
>>> r = has_real_roots(a, b, c)
>>> r
False

(x+1)(x-3) = x²-2x-3

>>> a, b, c = 1, -2, -3
>>> r = has_real_roots(a, b, c)
>>> r
True

>>> a, b, c = 2, -2, 3
>>> r = has_real_roots(a, b, c)
>>> r
False

(x-2)(x-2) = x²-4x+4

>>> a, b, c = 1, -4, 4
>>> r = has_real_roots(a, b, c)
>>> r
True

>>> a, b, c = 2, -4, 4
>>> r = has_real_roots(a, b, c)
>>> r
False

(x+1/2)(x-2) = 2x²-3x-2

>>> a, b, c = 2, -3, -2
>>> r = has_real_roots(a, b, c)
>>> r
True

>>> a, b, c = 3, -3, 2
>>> r = has_real_roots(a, b, c)
>>> r
False

(x+1)(x-2/3) = 3x²+1x-2

>>> a, b, c = 3, 1, -2
>>> r = has_real_roots(a, b, c)
>>> r
True

>>> a, b, c = 2, 1, 2
>>> r = has_real_roots(a, b, c)
>>> r
False