algebra 2
posted by amanda .
the height of a box is 6 inches. the length is three inches more than the width. find the width if the volume is 240 cubic inches

Volume = HLW
Volume = 240
H = 6
If W = x, then L = x +3
240 = 6x(x+3)
40 = x^2 + 3x
0 = X^2 + 3x  40
Solve for x.