fractions with radicals

Question

In Algebra 1 I am given the following problem:

 

(9 - 2√15) / (√3)

Please help me.

Answer 1

(9 - 2√5) / (√3)

(√3)(9 - 2√5) / (√3)(√3)     multiply both by √3

(9√3 - 2√15) / 3                 distribute / simplify