Rationalize the Denominator

Question

(√a-√b)/(√a+√b)

I have literally no idea how to do this one. It's an online class so I have no teacher to ask at the moment and need help. Also i copy and pasted the square root symbols, just to let you know.

Answer 1

Hey! multiply both the numerator and denominator by the conjugate. in this case it's square root a - square root b.