Réponses

2012-12-08T08:20:33+01:00

D= (x-5)²+(1-4x)²

D= 5X² -10X +25 + 1 -8X +16X²

D = 25 x² +16x² -10x-8x+25 +1

D= 41 x² -18x +26

 

E= (4x-3)² - (2x+1)(3x-2)

E = (16x² -24x +9) -( 6x² -4x +3x -2)

E= 16x² -24x +9 -6x² +x +2

E= 10x² -23x +11

 

 

2012-12-08T09:32:27+01:00

Bonjour

D = (x-5)²+(1-4x)² 

D = x²-10x+25 + 1-8x +16x²

D = 17x²-18x+26

 

E = (4x-3)²-(2x+1)(3x-2)

E = 16x²-24x+9 -6x²+4x-3x+2

E = 10x²-23x+11