4xy2 - 6x2y3 + 2x²y =
(x +9)(x + 2) - (3x – 5)(x + 2) =
(5x +8)(4x – 3) + (4x – 3)2 =
(3x – 4) - 9=
(5x + 1)(2x – 3) - (5x – 4)(5x + 1) =
(9 – x)2 – (8x + 2)2 =


Factorisation pour demain svp