Réponses

2014-10-16T22:10:44+02:00
(1-2(x-3))(1+2(x-3))
(1-2x+6)(1+2x-6)
(7-2x)(2x-5)
2014-10-16T22:18:36+02:00
Bonsoir
1² = 1     et 4(x-3)² =( 2(x-3))²  alors
1 - 4(x-3)²  est de la forme de a² - b² = (a-b)(a+b)  
(1 - 2(x-3))(1 + 2(x-3) )
(1 - 2x +6)(1 + 2x - 6) 
(-2x + 7)( 2x - 5)