Thread: Solving the Discriminant without "B" in the problem

I understand how to solve for the discriminant, however I do not understand when there is no "B" in the problem.

For example, 5x^2 - 7 = 0

5 = A
- 7 = C

How would I figure out what B is?

Thank you!

b = 0

Thank you! I was really over analyzing!