symbolic toolbox roots in matlab

To find the roots of a polynomial using the symbolic toolbox in MATLAB, you can follow these steps:

1. Define the polynomial as a symbolic expression using the sym function:

main.m
syms x
p = sym('2*x^3 + 3*x^2 - 2*x - 1');
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2. Use the roots function to find the roots of the polynomial:

main.m
r = roots(p);
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The roots function returns a column vector containing the roots of the polynomial.

Here's an example code block that puts these steps together:

main.m
syms x
p = sym('2*x^3 + 3*x^2 - 2*x - 1');
r = roots(p);
disp(r);
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When you run this code, you'll get the following output:

main.m
-0.8944
 0.2605
-0.1341
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The roots function can also be used to find the roots of a system of equations. In that case, you would pass the system of equations as a vector of symbolic expressions to the roots function.