(x+y)2

To expand the expression (x + y)^2, we can use the formula for expanding a binomial squared, which is (a + b)^2 = a^2 + 2ab + b^2.

So, for the expression (x + y)^2: = x^2 + 2xy + y^2

Therefore, (x + y)^2 = x^2 + 2xy + y^2.