You can put this solution on YOUR website! In this case, a square is a term that is squared. For instance, the variable x is a term and is a square. So if we have x and y, then and are both squares. Now subtract one from the other to get a difference of squares:
note: this also works for numbers. For instance, 25 is a perfect square that can be written as . So if we have it's the same as which is also a difference of squares.