(x-4)2
(x-4)(x-4) x2 - 4x - 4x + 16 x2-8x+16
(2x- 4) ( X2 + 3x + 3)
2x3 + 6x2 + 6x - (4x2+ 12x + 12)
So
2x3 + 2x2 -6x - 12
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