% Tund 2, ülesanne 9
g=ezplot('x^2+y^2=4')
set(g,'color','r')
hold on
h=ezplot('10*x^2+y^2-9=0')
set(h,'color','b')
hold off
legend('x^2+y^2=4','0*x^2+y^2-9=0')