Réponses

2014-03-15T16:40:12+01:00
A= (x-3)(-x-2) A x-3=0. -x-2=0 . x=3. x= -2
  • Utilisateur Brainly
2014-03-15T16:46:25+01:00
A=(x-3)²+(x-3)(1-2x)
  =(x-3)(x-3+1-2x)
  =(x-3)(-x-2)

B= (7x-3)²-25

  =(7x-3)²-5²
  =(7x-3-5)(7x-3+5)
  =(7x-10)(7x+2)

A=0
(x-3)(-x-2)=0
x=3 ou x=-2

B=0
(7x-10)(7x-2)=0
x=10/7 ou x=2/7