•Développer. c) (x-5) (x-3) (4x-2)(-3x-1) x(-x+1)(x+2) - 4x² (x+1)(2x - 4) Merci d’avance!

Bonjour,

Développer:

(x-5) (x-3)= x²-5x-3x+15= x²-8x+15

(4x-2)(-3x-1)= -12x²+6x-4x+2= - 12x²+2x+2

x(-x+1)(x+2)= x(-x²+x-2x+2)= x(-x²-x+2)= -x³-x²+2x

- 4x² (x+1)(2x - 4)= -4x²(2x²+2x-4x-4)= - 4x²(2x²-2x-4)= - 16x⁴+8x³+16x²