You are given a sheet of paper and asked to cut out a square piece with an area of (4x^2-44x+121)mm^2. The dimensions of the square have the form ax-b, where a and b are whole numbers. a. Find the length of the one of the sides of the square you cut out. b. Find an expression for the perimeter of the square you cut out. c. Find the perimeter when x=41mm.