import numpy as np

def solve_quad(a,b,c):

if a == 0:

print("您輸入的不是二次方程!")

else:

delta = b*b-4*a*c

x = -b/(2*a)

if delta == 0:

print("方程有惟一解，X=%f"%(x))

return x

elif delta > 0:

x1 = x-np.sqrt(delta)/(2*a)

x2 = x+np.sqrt(delta)/(2*a)

print("方程有兩個實根:X1=%f,X2=%f"%(x1,x2))

return x1,x2

else:

x1 = (-b+complex(0,1)*np.sqrt((-1)*delta))/(2*a)

x2 = (-b-complex(0,1)*np.sqrt((-1)*delta))/(2*a)

print("方程有兩個虛根，如下所示：")

print(x1,x2)

return x1,x2