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?

Question

A: ?

Answer 1

(x-2)(x+2) = 780

x^2 - 4 = 780

x^2 = 784

Solve for x, then x+2 and x-2.