% HW4_4_f

x1 = -5:.1:.6;
x2 = 1.5:.1:2.5;
y1 = x1.*(4-x1.^2).*(4+x1)./(1-x1)
y2 = x2.*(4-x2.^2).*(4+x2)./(1-x2)
plot(x1,y1)
hold on
plot(x2,y2)
hold off
grid on
