import math
def quadratic_equation(a, b, c):
x1 = ((-b + math.sqrt(b** - 4*a*c))/2a)
x2 = ((-b - math.sqrt(b** - 4*a*c))/2a)
return x1,x2
print quadratic_equation(2, 3, 0)
print quadratic_equation(1, -6, 5)
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