Question

How do you rationalize the denominator and simplify `7/(sqrtx+sqrty)`?

Answer 1

`7(sqrtx-sqrty)/(x-y)`

Explanation:

Multiply both numerator and denominator by the conjugate of the denominator `sqrtx-sqrty` and use
`(a^2-b^2)=\(a-b)(a+b)`