Question: 
Write a function to calculate the discriminant value.


Model's Code:
def discriminant_value(a, b, c):
    discriminant = b**2 - 4*a*c
    if a == 0 and b == 0:
        return ("one solution", discriminant)
    elif discriminant > 0:
        return ("Two solutions", discriminant)
    elif discriminant == 0:
        return ("one solution", discriminant)
    else:
        return ("no real solution", discriminant)



Sample Correct Code:
def discriminant_value(x,y,z):
    discriminant = (y**2) - (4*x*z)
    if discriminant > 0:
        return ("Two solutions",discriminant)
    elif discriminant == 0:
        return ("one solution",discriminant)
    elif discriminant < 0:
        return ("no real solution",discriminant)


Asserts:
assert discriminant_value(4,8,2)==("Two solutions",32)
assert discriminant_value(5,7,9)==("no real solution",-131)
assert discriminant_value(0,0,9)==("one solution",0)


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 963 of 974: 737/963 (76.53167185877466%): success