5m Zen
X 2 2x m 0
X 2 2x m 0 pictures 5
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X 2 2x m 0
x 2 m 2x 2m 0
x 2 2x m m 4 u2267 0
2x 2 m 2 x 3m 0
x 2 2x m 5 0
x 2 2x m 2 4 0
x 2 2x m 3 0
m 1 x 2 2x m 0
cho pt x 2 2x m 0
x 2 2x m 0
