def test_root6(self):
"""Two positive roots"""
check(self, roots(1, -7, 10), (2, 5))
def test_root5(self):
"""Leading coefficent"""
check(self, roots(2, -1, -28), (-3.5, 4))
def test_root4(self):
"""Different roots"""
check(self, roots(1, 5, 6), (-2, -3))
def test_root3(self):
"""Imaginary roots"""
check(self, roots(1, 0, 4), None)
def test_root2(self):
"""Same root"""
check(self, roots(1, 6, 9), (-3, -3))
def test_root1(self):
"""Basic difference of squares"""
check(self, roots(1, 0, -4), (-2, 2))