Question 713476
(x^(2)-y^(2))/(x+y)

The binomial can be factored using the difference of squares formula, because both terms are perfect squares.  The difference of squares formula is a^(2)-b^(2)=(a-b)(a+b).
((x-y)(x+y))/(x+y)

Reduce the expression by canceling out the common factor of (x+y) from the numerator and denominator.
((x-y)<X>(x+y)<x>)/(<X>(x+y)<x>)

Reduce the expression by canceling out the common factor of (x+y) from the numerator and denominator.
(x-y)

Remove the parentheses around the expression x-y.
x-y