Réponses

2013-01-06T16:13:47+01:00

B(x) = (x²+12x+36) + (4x²-3x+8x-6)

= x²+12x+36+4x²+5x-6

= 5x²+17x+30

 

Factorisation

(x+7)(2x+1)+(x+5)

= (x+7)(2x+1+x+5)

= (x+7)(3x+6)

 

(x+3)(x+3)-2(x-3)

= (x+3)(x+3-2x-6)

= (x+3)(-x-3)