Réponses

2014-04-27T20:30:24+02:00
developper

G=x²-10x+25-2x²-7x-35+10x
G=x²-2x²-10x-7x+10x-35+25
reduire
G=-x²-7x-10

factoriser

G=(x-5)²-(x-5)(7-2x)
G=(x-5)(x-5)- (x-5)(7-2x)
G=(x-5) [(x-5)-(7-2x)]
G=(x-5) (x-5-7+2x)
G=(x-5) (3x-12)

calculer

G= (x-5)² -(x-5)(7-2x)
G= ((-3)-5)²- ((-3)-5)(7-2(-3)
G=-9-30+25-18-21-30-35
G= -118

resoudre l'equation

G=(x-5)(3x-12)=0
G=(x-5)=0 ou (3x-12)=0
G= x=0+5 ou 3x= 0+12
G= x=5 ou 3x=12
                  x=12/3
                  x=4

voila