Remove the radical from the denominator below. Do not simplify the answer.

Question

-2 sqrt15 / (6- sqrt13)

Answer 1

-2 √15 / (6- √13)
= -2 √15 / (6- √13) * (6+√13)/(6+√13)
= (-12√15 - 2√195)/(36-13)
= -(12√15 + 2√195)/23