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

10x^2 - 15x = 5x * (2x - 3)

4x^2 - 2x = 2x * (2x - 1)

42x^5y^3 - 30x^2y^7 - 18x^4y^4 =
6x^2y3 * (7x^3 - 5y^4 - 3x^2y)

3(2 + 3x) - (5 + 2x)(2 + 3x) =
(2 + 3x)(3 - 5 - 2x)
(2 + 3x)(-2 - 2x)
(2 + 3x) * (-2)(1 + x)
(-2)(2 + 3x)(1 + x)

(5x - 4)(2x + 1) - (5x - 4)(4x - 3) =
(5x - 4)(2x + 1 - 4x + 3)
(5x - 4)(-2x + 4)
(5x - 4) * 2(-x + 2)
2(5x - 4)(-x + 2)

(1 - 2y)(4y + 3) - (1 - 2y) =
(1 - 2y)(4y + 3 - 1)
(1 - 2y)(4y + 2)
(1 - 2y) * 2(2y + 1)
2(1 - 2y)(2y + 1)

(1 - 6x)^2 - (1 - 6x)(2 + 5x) =
(1 - 6x)(1 - 6x - 2 - 5x)
(1 - 6x)(-1 - 11x)
(1 - 6x) * (-1)(1 + 11x)
-(1 - 6x)(1 + 11x)
(6x - 1)(1 + 11x)