Question

Rationalise the denominator
3- root5/3+2root5 × 3-2root5/3-2root5​

Answer 1

》(3 - root 5) × (3 - 2 root 5) /[ (3^2) - (2 root 5)^2]

》In the above, we have used the identity of (a+b) × (a-b) which is a^2 - b^2 in Denominator.

》(19 - 9 root 5) / (9 - 20)

》(19 - 9 root 5) / -(11)

》9 root 5 - 19 / 11

May your doubt be clarified by me...

Answer 2

hey mate here's the ans

hope it helps u:)