g=ezplot('x^2+y^2=4',[-2,2,-3,3])
set(g,'color','k')
hold on
h=ezplot('10*x^2+y^2-9=0',[-2,2,-3,3])
set(h,'color','r')
hold off
legend('x^2+y^2=4','10*x^2+y^2-9=0')
grid on
title('Tänase tunni viimane ülesanne')