python - Quadratic equation

print("programme to solves  Quadratic equation (equation of the second degree) ")
print("this programme solves equations \n like  Ax²+Bx+C=0")
while True:
    num1 = input("Please enter the value of A : ")
    try:
        a = int(num1)
        break
    except ValueError:
        try:
            a = float(num1)
            break
        except ValueError:
            print("This is not a number. Please enter a valid number")
while True:
    num2 = input("Please enter the value of B : ")
    try:
        b = int(num2)
        break
    except ValueError:
        try:
            b = float(num2)
            break
        except ValueError:
            print("This is not a number. Please enter a valid number")
while True:
    num3 = input("Please enter the value of C : ")
    try:
        c = int(num3)
        break
    except ValueError:
        try:
            c = float(num3)
            break
        except ValueError:
            print("This is not a number. Please enter a valid number")
if a == 0 and b == 0:
    print("the resulte is", c, "=0\n it's incorrect equation")
elif a == 0 and b != 0:
    x = c / b
    print("the val of X is:\n x = ", x)
elif a != 0 and b == 0:
    from math import sqrt
    from math import fabs

    x = fabs(c / a)
    x = sqrt(x)
    print("the val of X is:\n x1 = ", x, "    x2 = -", x)
else:
    from math import sqrt

    delta = (b ** 2) - (4 * a * c)
    if delta < 0:
        print("the equation: ", a, "x²+", b, "x+", c, "=0 has no real solution")
    elif delta == 0:
        x = b / (2 * a)
        print("the equation: ", a, "x²+", b, "+", c, "=0 has unique solution")
        print("x = ", x)
    elif delta > 0:
        from math import sqrt

        x1 = ((-b + sqrt(delta)) / (2 * a))
        x2 = ((-b - sqrt(delta)) / (2 * a))
        print("X has two value are :")
        print("X = ", x1, "  or   X = ", x2)