7 x 4 ) 2 28 July 8, 2019 16 32 64 128 X 7 )( x 4 )= x 2 gx 28 28 7 34 5 x 2 4 28 7 34 5 x 2 4 bằng bao nhiêu 2 7 x 1 4 )= 3 28 7 x 4 = 28 - 4/7 * x ^ 2 + 28 = 0 2x 7 7 x 4 / 2
