X 3 2 49 0 July 8, 2019 16 32 64 128 X 3 x 2 49x 49 0 X 3 3xy 2 49 0 Tìm x 2x 3 2 49 0 Tìm x biết 2x 3 2 49 0 2x x 2 3 )( x 2 49 )= 0 X 3 − 7x 2 − 7x 49 0 X 2 7x 49 0 then x 3 3 36x 2 49 )( x 2 64 )= 0 Jika x 2 49 0 dan y 3 maka