Prove that 4 3 root 2 is irrational number

- Prove that 4 3 under root 2 is an irrational number
- Prove that 3 4 root 2 by 7 is irrational number
- Prove that 4 minus 3 root 2 is an irrational number
- Prove that 3 root 2 upon 4 is an irrational number
- Prove that 3 4 root 2 is an irrational number given that root 2 is an irrational number
- What is irrational number