Réponses

2013-04-06T12:01:53+02:00
A) A=(x+2)(x-3)+(x-3)=x^2-3x+2x-6+x-3=x^2-9
B=(2x-3)^2=4x^2-12x+9

b) A=3^2-9=9-9=0

c) B=(2*1,5-3)^2=(3-3)^2=0