Tính. a, [^2 -2x +1 ] . [2x-3]. b, [3x-1] .[2x-[x-1] .[+1 ]. c, [2x +1 ] . [2x-1] - [3x-1 ] . [ x^2 -3x - 5]. d, [ 9x^3 -6x^2 + 5x - 4] :[ x^2 - 2]. e, [ 4x^2 -7x + m] : [x-1]

Câu1 tính 
a, [^2 -2x +1 ] . [2x-3]
b, [3x-1] .[2x-[x-1] .[+1 ]
c, [2x +1 ] . [2x-1] - [3x-1 ] . [ x^2 -3x - 5]
d, [ 9x^3 -6x^2 + 5x - 4] :[ x^2 - 2]
e, [ 4x^2 -7x + m] : [x-1]
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