Any polynomial is evaluated by substituting the specified values for the variable and performing the computation to simplify the polynomial to a numerical result. To accurately evaluate a polynomial, the order of operations and integer operations must be applied correctly.
To get a polynomial from its roots, use the poly function: p = poly(r). The inverse of the roots function is the poly function.
Find the roots of nonlinear equations with the fzero function.
The simplest method to use these functions is as follows: In a least-squares sense, p = polyfit(x, y, n) determines the coefficients of a polynomial p(x) of degree n that best fits the data y. p is a n + 1 row vector that contains the polynomial coefficients in ascending powers, p(1)*xn + p(2)*x(n - 1) +...
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