Trying to find the equation to this problem 4x^2-4x+5=0

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Factor the polynomial. b^2 + 4b + 4

Select all of the following expressions that are equal to 2.5.