giúp mik vs5x - 4(6-x)(x + 3) = (4-2x)(3-2x) + 2
(x - 1)3 - (3x + 2)(-12) = (x2 + 1)(x - 2) - x2 (3x -1)2 - (x +3)(2x-1) = 7(x + 1)(x -2) -3x
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