If \( x, y \) are integral solutions of \( 2 x^{2}-3 x y-2 y^{2}=7 \), then value of \( |x+y| \)...

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If \( x, y \) are integral solutions of \( 2 x^{2}-3 x y-2 y^{2}=7 \), then value of \( |x+y| \) is
(1) 2
(2) 4
(3) 6
(4) 2 or 4 or 6
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