1/ r = 4*x;
f(-3)= 4*(-3) = -12
f(0)=4*0 = 0
f(2)= 4*2=8
2/ r = 3*u
f(-3) = 3*(-3) = 9
f(0) = 3*0 = 0
f(2)= 3*2= 6
1/ r = 4*x;
f(-3)= 4*(-3) = -12
f(0)=4*0 = 0
f(2)= 4*2=8
2/ r = 3*u
f(-3) = 3*(-3) = 9
f(0) = 3*0 = 0
f(2)= 3*2= 6