Question

Marie has a square piece of cloth. She needs another piece with a length 2 inches shorter than the side of the square piece and a width 2 inches longer. The area for the new piece of cloth is 780 in^2. What will be the dimensions of the new piece of cloth?

A: ?

Answer 1

If the old cloth had side s, the new cloth satisfies

(s-2)(s+2) = 780
26x30