# Fond The Value of The Given Equation :

If x=a^{1/2}+a^{-1/2}, Y=a^{1/2}-a^{-1/2}, then value of (x^{4}-x^{2}y^{2}-1)+(y^{4}-x^{2}y^{2}+1)

- 13
- 12
- 16
- 14

If x=a^{1/2}+a^{-1/2}, Y=a^{1/2}-a^{-1/2}, then value of (x^{4}-x^{2}y^{2}-1)+(y^{4}-x^{2}y^{2}+1)

- 13
- 12
- 16
- 14