Réponses

2013-02-04T20:36:32+01:00

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

B=x^4 +6x^3+8x^2 +6x^3+36x^2+48x+8x^2+48x+64=x^4+12x^3+52x^2+96x+64

 

2)

A-B=-8x^3-48x^2-96x-64