Hi, I would like to ask if my answer is correct or not, here is the question.

Here is my Code

% Graphical method to solve x.^4 + x.^3 - 2*x.^2 +1
x = -5:.1:5;
f = inline('x.^4 + x.^3 - 2*x.^2 +1');
plot(x,f(x))
xlabel('x');ylabel('f(x)')
grid;zoom on

Answer 1

[Salaheddin Hosseinzadeh]

Hi,

Looks alright.

You can use xlim, ylim to limit the view and see the zero crossing location better, however assuming that we don't know where is the zero then you can manually zoom to find it or

ylim([-0.2,0.2]); %this helps you see the zero crossing better

Good luck ;)

[Erwin Koman]

Thank you so much.