Răspuns:
f(x)=2x-4
f(1/2)=2*1/2-4=1-4=-3
f(3/2)=2*3/2-4=-1
f(3)=2*3-4=2
2-3=-1,adevarat
f(x)=2x-4
int cu oy,x=0,rezulta y=-4 B(0,-4)
int.cu Ox,y=0 rezulta x=2,A(2,0)
A mijl lui BC
XA=(XB+XC)/2
YA=(YB+YC)2
4=XC
2*2=-4+YC
YC=8
dIst de la C la ox=yC=8
dist.de la C la oy=XC=4
suma=8+4=12