Compute the roots of the polynomial c.
For a vector c with N components, return the roots of the polynomial
c(1) * x^(N-1) + … + c(N-1) * x + c(N)
As an example, the following code finds the roots of the quadratic polynomial
p(x) = x^2 - 5.
c = [1, 0, -5]; roots (c) ⇒ 2.2361 ⇒ -2.2361
Note that the true result is +/- sqrt(5) which is roughly +/- 2.2361.
See also: poly, compan, fzero.
Package: communications