To prove that the equation MX ^ 2 + (M + 6) x + 3 = 0 must have real roots

To prove that the equation MX ^ 2 + (M + 6) x + 3 = 0 must have real roots

Because B ^ 2-4ac = (M + 6) ^ 2-12m = m ^ 2 + 36 must be greater than 0
So the equation MX ^ 2 + (M + 6) x + 3 = 0 must have real roots