Réponses

2014-09-06T14:32:26+02:00
Bonjour

9x²+25+30x
(3x + 5)²

(x-3)(x+1)-(x²-9)
(x-3)(x+1) - (x-3)(x-3)
(x-3)[(x+1) - (x-3)]
(x-3)(x+1-x+3)
(x-3)(4)

(2x-1)(x+5)+(1-2x)(3-2x)
(2x-1)(x+5) - (2x-1)(3-2x)
(2x-1)[(x+5) - (3-2x)]
(2x-1)(x+5-3+2x)
(2x-1)(3x+2)

36-81x²

(6x + 9)(6x-9)