You just enter the quadratic. The quadratic formula is derived using a method of completing the square. You da real mvps.
Convert the terms in the parentheses into a perfect square.
1 per month helps. There is one extra step for solving this equation because the leading coefficient is not 1. Leave yourself some room to work with. 4x2 40x - 300 0 so we have 4x2 40x 300.