x/x+y + y/x-y pkai caranya dan jwb

[tex] \frac{x}{x + y} + \frac{y}{x - y} \\ = \frac{x(x - y) + y(x + y)}{(x + y)(x - y)} \\ = \frac{{x}^{2} - xy + xy + {y}^{2} }{ {x}^{2} - xy + xy - {y}^{2} } \\ = \frac{ {x}^{2} + {y}^{2} }{ {x}^{2} - {y}^{2} } [/tex]