Sadly the boy has come to expect that in watching vintage television. The discriminant is part of the quadratic formula in the form of b 2 4 ac. Then square root it 3.
I tried evaluating b2-4ac 2.
Oh deeply problematic yes. The expression b2 4ac is called the discriminant and in some books you will see it written with a Greek upper case Delta like this Delta b2 4ac. In addition notice the symbol. Note that and can be positive as well as negative.