Question

If x =3+2‍‍‌root 2 find the value of x square +1/x square

Answer 1

Answer:

290/17

Step-by-step explanation:

(3+2root2)²+1/(3+2root2)²

3²+(2root2)²+1/3²+(2root2)²

9+(root8)²+1/9+(root 8)²

9+8+1/9+8

17+1/17

17×17+1×1/17

289+1/17

290/17