Question

Question #0ff75

Answer 1

`x^2+y^2+xy`

`=x^2+y^2+2xy-xy`

`=(x+y)^2-xy`

`=((sqrt2+1)/(sqrt2-1)+(sqrt2-1)/(sqrt2+1))^2-(sqrt2+1)/(sqrt2-1)xx(sqrt2-1)/(sqrt2+1)`

`=(((sqrt2+1)^2+(sqrt2-1)^2)/(2-1))^2-1`

`=((2(2+1))/(2-1))^2-1=6^2-1=35`