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Cho parabol y x 2
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Cho parabol y
Cho parabol y x 2
cho parabol y x 2 mx n
cho parabol y x 2 2x 5
cho parabol yu003dx^2-2x+4
cho parabol y x 2 4
cho parabol y x 2 2ax b 1
cho parabol y u003d- x 2 4x 2
cho parabol y x 2 2x 3
cho parabol y x 2 2x m 1
cho parabol y x 2 4x 3
cho parabol yu003dx^2
