You need to parameterize the function:
Note that it is usually simpler and more robust to loop over indices rather than looping over data, e.g.:
Eq1 = @(A) 2*A + A.^2 - 5*A;
Eq2 = @(A) 3*A + A.^3 - 2*A;
B = 5;
AC = @(A,x) B - 2*integral(Eq1,5,A) - x*integral(Eq2,5,A);
X = 0:1:10;
N = numel(X);
Z = nan(0,N);
for k = 1:N
Z(k) = fzero(@(A)AC(A,X(k)),0);
end
Giving:
>> Z
Z =
5.2309 5.033 5.0178 5.0122 5.0092 5.0074 5.0062 5.0054 5.0047 5.0042 5.0038
