The equation of second degree \( x^{2}+2 \sqrt{2} x y+2 y^{2}+4 x+4...

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The equation of second degree \( x^{2}+2 \sqrt{2} x y+2 y^{2}+4 x+4 \sqrt{2} y+1=0 \) represents a pair of straight lines, the distance between them is
\( \mathrm{P} \)
(a) 2
(b) \( 2 \sqrt{3} \)
(c) 4
(d) \( 4 \sqrt{3} \)
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