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Find the intervals of the values of 'a' for which the line y + x = 0 bisects two chords drawn from a point `((1+sqrt2a)/2,(1-sqrt2a)/2)` to the circle
`2x^2+2y^2-(1+sqrt2a)x-(1-sqrt2a)y=0`

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`a in (- infty,-2)cup(2,infty)`
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