f(x) = x^3 - 12*x^2 + 36*x +8
f(x) = 
fplot(f,[-1,9], 'LineWidth',2)
title('f(x) = x^3 - 12*x^2 + 36*x +8')
ylabel('f(x)', 'rotation',0)
annotation('textarrow',[0.7515 0.6775],[0.2751 0.4079],'String','Local min')
annotation('textarrow',[0.3085 0.3615],[0.7526 0.6287],'String','Local max')