sqrt u - sqrt v/sqrt u + sqrt v =
u-2 sqrt uv+v / sqrt u-v ?
The numerator is (sqrt u - sqrt v)^2
Are you sure the denominator is not sqrt u - sqrt v?
Your #1 problem requires parentheses for clarification
u-2 sqrt uv+v / sqrt u-v ?
Are you sure the denominator is not sqrt u - sqrt v?
Your #1 problem requires parentheses for clarification