Réponses

2014-01-11T18:02:19+01:00
A=(x+2)^2-16=(x+2+4)(x+2-4)=(x+6)(x-2)

A=(2x+3)^2-(x-1)^2=(2x+3-x+1)(2x+3+x-1)=(x+4)(3x+2)

A=x^2-2x=x(x-2)

A=(x+1)-x(x+1)=(x+1)(1-x)