Question

Rationalize the denominator and simplify.

Answer 1

First, you do know what "rationalize the denominator" means, right?

There is a neat little trick to make this case easy. We have to go back to something you probably learned while factoring:

[CORRECTED] Do you remember this formula? \[(a+b)(a−b)=a^2 - b^2\]

if you let a=sqrt(x) and b=sqrt(y), see what happens to \[a^2 - b^2\]

Answer 2

no

Answer 3

so like a first step multiplie top and bottom by sqrt(x) -sqrt(y) so what will get for denominator ?