MATLAB: Plotting two linear equations

equationlinearplot

Hi. How can i plot this equation between (-5,2) values

f(x) =

Use ‘logical indexing’:

x = linspace(-5,2);
f = @(x) (-1).*(x < -1) + (x.^2 + x).*((x >= -1) & (x < 2));
figure(1)
plot(x, f(x))
grid

syms x
A=[x 2 1;1 0 -x;5 1 x];
x=-15:.1:15;
plot(x,subs(det(A),x))
grid on

Use element-wise divide operator ./ instead of matrix divide operator /

f=@(x)((1+x.^2-1.5*x.^3+0.5*x.^4)./(1+x.^4))