There's no question there. It's just a number.
If you're looking for the value of the number, then it depends on
the values of 'x' and 'y', and you haven't told us either one.
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y^2=-x^2-8x+6
(x - y + 7)(x + y)
Your expression is this... x2 + y2/x
y6 x y2 y4 x y4 y2 x y2 x y4 y2 x y2 x y2 x y2
a2+b2+c2=x2+y2+z2 divide each side by 2 (a2+b2+c2)/2=(x2+y2+z2)/2 a+b+c=x+y+z