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Ok, I figured it out. I needed the command subs(d) to get rid of the symbolic variables.

I have a matrix that is a function of the symbolic variable s, and i'm trying to solve for the value of s that makes the determinant of the matrix = 0. Here is the code: syms s matrix=[s^2+1 s^2*2+1;2*s^2 3*s^2+1]; d=det(matrix); solve('d=0'); I'm almost positive the problem is with the solve...