Réponses

2012-11-18T15:23:15+01:00

(2x-1) ( 2x+1 ) + ( x+5)² - 3(2x-4)²

IL FAU DISTRIBUER

4x+2x -2x-1) +x²+25 -3(4x+16)

 

4x+2x-2x-1+x²+25-12x+13

 

x²-8x+37

2012-11-18T15:26:32+01:00