Question

The x-y is the answer can someone please explain to me how to do

Answer 1

See picture.

Explanation:

Answer 2

Explanation:

`(√(x-y))/(√(x+y)-√(x-y))-(√(x-y))/(√(x+y)+√(x-y))\\\\=(√(x-y)*(√(x+y)+√(x-y))-(√(x-y))*(√(x+y)-√(x-y)))/((√(x+y)-√(x-y))*(√(x+y)+√(x-y)))\\\\=\frac{√(x-y)*(√(x+y)+√(x-y)-√(x+y)+√(x-y))}{(√(x+y))^2-(\sqrt{x-y)^(2)}}\\\\=(√(x-y)*2√(x-y))/(x+y-x+y)\\\\=2*(x-y)/(2y)=(x-y)/(y)\\\\((√(x-y))/(√(x+y)-√(x-y))-(√(x-y))/(√(x+y)+√(x-y)))*y=(x-y)/(y)*y\\\\=x-y`