2 kurang akar 2 per 3 tambah akar 2

2 – √2
_____
3 + √2

= 2 – √2 3 – √2
______ × _____
3 + √2 3 – √2

= 6 – 5√2 + 2
__________
9 – 2

= 8 – 5√2
______
7