Quadratic equation

Question

the width of a rectangular piece of cardboard is 8in less than its length. A square piece that measures 2in on each side is cut from each corner, then the sides are turned up to make a box with the volume 480in cubed. find the length and width of the original piece of cardboard.

Answer 1

the three sides of the box are

 

L = x - 2*2

 

W = x - 8 - 2*2

 

H = 2

 

volume = L*W*H = 480

 

now you just substitute