the following identity can be used to find pythagorean triples, where the expressions x^2 - y^2 , 2xy, and x^2 +y^2 represent the lengths of three sides of a right triangle; x and y are positive integers; and x > y. (x^2 - y^2)^2 + (2xy)^2 = (x^2 + y^2)^2 if the sides of a right triangle are 140, 171, and 221 units, what are the the values of x and y?

Select two answers: one for x and one for y.