One side of the rectangle is 2a-b, and the other side is A-B smaller than it A = the square of X + the square of xy-y, B = - the square of X - 2XY + the square of Y. when x = 1, y = 1, find the value of 2a-b.

One side of the rectangle is 2a-b, and the other side is A-B smaller than it A = the square of X + the square of xy-y, B = - the square of X - 2XY + the square of Y. when x = 1, y = 1, find the value of 2a-b.

The circumference of a rectangle
={ [(2a-b)+[(2a-b)-(a-b) ] }x2
=[(2a-b)+a]x2
=(3a-b)x2
=6a-2b