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X 2 1 x2
X 2 1 x2 pictures 5
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X 2 1 x2
x2 1 x2 2 2x 2 x
x 1 x 2 then x2 1 x2
x2 1 x2 2 3x 3 x
x2 2 k 1 x k2 0
equation of x 1 2 x2 0
x2 3x 1 u003d( x 2 2
x 2 3 2x x2 1
x 3 /( 1 x 2 1 x2
x3 x 2 1 x2
x 2 1 x2
