a) f(3) =12+2=14
A(3;14)
b) 4x+2=6
x=1
B(1;6)
c) x=y=f(x)
4x+2=x
3x=-2
x=-2/3
y=-8/3+2=-2/3
C(-2/3;-2/3)
d) f(x) =-x
4x+2=-x
5x=-2
x=-2/5
f(-2/5) =-8/5+10/5=2/5
D(-2/5;2/5)
e) f(x) =2x
4x+2=2x
2x=-2
x=-1
y-f(x) =-4+2=-2
E(-1;-2)
f) f(x) =3x
4x+2=3x
x=-2
y=f(-2)=-8+2=-6
F(-2;-6)
bine e sa le inveti...fff posibile la ORICE fel de testare