Réponses

2012-10-23T17:03:54+02:00

f(x)=3(x-5)² appliquer (a-b)²=a²-2ab+b²

f(x)=3(x²-10x+25)=3x²-30x+75

 

f(x)=-(z-1)²+3=-(z²-2z+1)+3=-z²+2z-1+3=-z²+2z+2