MATLAB: Solve systems of equations graphically

Question

Hi, I'm searched many web pages and didn't find out specific and easy answer so I'm writing here and hoping to get the answer.

So there is the system:

Answer 1

Do you just want to plot them to see where the curves cross?

x=-5:5;
y=.5*x.^2-2;
z=x+2;
plot(x,y,x,z);
grid on;
grid minor;