The problem is: "In an electrical circuit, the voltage, V volts, as a function of time, t minutes, is given by V = 12 - 9t + 2t^2. Determine the greatest and least values of voltage during the first 5 min. When do these values occur?" The answers given are exact. Least: 1.875 V @ 2.25 min Most: 17 V @ 5 min Well I know how to get the max, but the min? Thanks!!