Website Statistics resoudrex 1 2x 4 3x 1

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(x+1)(2x-4)-(3x-1)^2=2x^2 -4x +2x -4 - 9x^2 - 1 + 6x = -7x^2 -5 +4x

voila ;)
(x + 1) (2x - 4) - (3x - 1)²
= (2x² -4x +2x -4) - (9x² -6x +1)
= 2x² -2x -4 -9x² +6x -1
= -7x² +4x -5

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