Simplify:[(2x−y)+y][(2x−y)−y]
The given expression is [(2x−y)+y][(2x−y)−y]=(2x−y+y)(2x−2y)=2x(2x−2y) [y gets cancelled]=4x2−4xy is the required simplified expression.
Which of the following is correct unchanging relation of perimeter of rectangle with length x and breadth as y?