a strip of wire of length 32 cm is cut into two pieces. one iece is bent to form a square of side x cm. the other piece is bent to form a rectangle of length lcm and width 3cm. write an expression, in terms of l and x, for the length of the strip wire. show that l=13-2x. the sum of the areas of the squareand the rectangle is represented by S. show that S=x^2-6x+39
