Question

b

Answer 1

b^2-4ac

Answer 2

this is called the discriminant, that will tell you if you have one solution, two solutions and a complex solution (known as no solution)

Answer 3

I am not sure that it will tell you if you can use factoring.....
when a quadratic is not factorable, we call that prime

Answer 4

factoring does not always work
but the quadratic formula works 100% of the time....

Answer 5

if this is a test question or study question, it is not a valid question.