Réponses

2012-10-04T18:11:36+02:00

A=(9x^2+6x+1)-(16x^2+24x+9)

A=-7x^2-18x-8

 

B=(-2x-2)-(3x^2-6x+7x-14)

B=(-2x-2)-(3x^2+x-14)       B= 3x^2-3x-12

 

 

C=(9x^2-8x+4)-2(x^2+10x+25)      

C=9x^2-8x+4)-(2x^2-6x-24)   C=7x^2-2x+28