Pouvez vous m'aider? Merci beaucoup... Factorise:
10x2 – 15x,
4x 2 – 2x,
42x5 y3 - 30x²y7 - 18x4y4,
3(2 + 3x) - (5 + 2x)(2 + 3x),
(5x -4)(2x +1) - (5x -4)(4x -3),
(1-2y)(4y+3) – (1-2y),
(1 - 6x)² - (1 - 6x)(2 + 5x)
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