Question

Rationalise the denominator of 1/3-√8

Answer 1

1/(3-root8)
Multiply and divide by 3+root8
=1/(3-root8) × (3+root8)/(3+root8)
=(3+root8)/(3^2-(root8)^2)
=(3+root8)/(9-8)
=3+root8

Hope it helps!!

Answer 2

See the attach file for ur ans