find all solutions for the following equation: in matlab

To find all solutions for an equation in Matlab, you can use the solve function from the Symbolic Math Toolbox. Here is an example:

main.m
syms x
eqn = x^2 - 2*x - 3 == 0;
sol = solve(eqn, x);
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In this example, we define the variable x as a symbolic variable using the syms function. Then we define our equation eqn. Finally, we use the solve function to find all solutions to the equation eqn for the variable x. The resulting solutions are stored in the variable sol.

You can also solve systems of equations using the solve function by passing in multiple equations as arguments.