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2x 9 2 3 2 x 2 6
2x 9 2 3 2 x 2 6 pictures 5
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2x 9 2 3 2 x 2 6
cho a 2x x 3 2 x 3 x 2 x 6 9 x 2
y u003d( x 2 x 6 )( x 2 2x 3 )/ x 2 9
2x 9 2 3 2 x 2 6
