Question

rationalise 1/√5-2√6​

Answer 1

1*√5+2√6/√5-2√6*√5+2√6

√5+2√6/(√5)²-(2√6)²

√5+2√6/5-(4*6)

√5+2√6/5-24

√5+2√6/-19

-(√5+2√6)/19

-√5-2√6/19

Hope it helps