Prove that 2 under root 3 is a rational number

- Prove that 3 2 under root 5 is a rational number
- Prove that 2 minus root 3 is a rational number
- Prove that 2 root 3 is not a rational number
- Prove that 7 2 root 3 is a rational number
- Prove that 2 root 3 1 is a rational number
- Prove that 2 root 3 upon 5 is a rational number
- Prove that 5 2 root 3 is not a rational number
- Prove that 7 3 under root 2 is not a rational number