Résoudre :
(x-1)(x+3)=(2-x)(x-1)
Factoriser:
(x-1)(x+3)-(2-x)(x-1)=0
(x-1)(x+3-x+1)=0
4(x-1)=0
4x-4=0x=1
(x-1)(x+3)=(2-x)(x-1) (x-1)(x+3)-(2-x)(x-1)=0 (x-1)(x+3-2+x)=(x-1)(2x+1)
bonne chance
