Réponses

2013-02-18T22:42:23+01:00

exercice 1

développer et réduire f(x)=(2x+1)²-(5x/2-1)*(2x+1)

f(x)=((2x)²+2*2x*1+1²)- (5x/2)*2x+(5x/2)*1+1*2x+1*1

f(x)=4x²+4x+1-(5x²+5x/2+2x+1)

f(x)=4x²+4x+1-5x²-5x/2-2x-1

reduire f(x)= -x²+1x/2