Réponses

2014-01-20T16:45:45+01:00
A(x)=(x+2)²-16 A(x)=(2x+3)²-(x-1)²
=(x+2)²-4² =[(2x+3)-(x-1)][(2X+3)+(x-1)]
=(x+2-4)(x+2+4) =(2x+3-x+1)(2x+3+x-1)
=(x-2)(x+6) =(1x+4)(3x+2)