Kyle anticipates that he will be in a higher tax bracket when he retires than he’s in now. For Kyle, a
IRA would be a better choice if he wants to pay less tax, since the tax will be collected when he
funds.

So to find the discriminant of a quadratic equation, the formula is b² - 4ac with a = x² coefficient, b = x coefficient, and c = constant. In this case, our equation is

Firstly, solve the multiplications and the exponents:

Next, subtract and we find that our discriminant is 0.

*Additional Info: Since the discriminant is zero, this means that this quadratic equation has 1 real solution.