Sagot :
[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3
[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30
[8x-7][12-3x]=96x-24x-84+21x=93x-84
[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3
[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30
[8x-7][12-3x]=96x-24x-84+21x=93x-84
Exercices : développer et réduire
(3x-1) (2x+3) = ?
(x-5) (x-6) = ?
(8x-7) (12-3x) = ?
3 (x+3-2) (x+8) = ?
[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3
[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30
[8x-7][12-3x]=96x-24x-84+21x=93x-84
[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3
[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30
[8x-7][12-3x]=96x-24x-84+21x=93x-84