input: Write a python function to find the discriminant of a quadratic equation.
  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)
output: def discriminant_value(a, b, c):
      discriminant = b**2 - 4*a*c
      if discriminant > 0:
          return ("Two solutions", discriminant)
      elif discriminant == 0:
          return ("one solution", discriminant)
      else:
          return ("no real solution", discriminant)