Finding roots of symbolic expression

You cannot directly use the roots function to find the roots of a symbolic expression.

syms x
fx = x^2 + 2*x + 1

How do you find the roots of fx other than by typing the coefficients in an array?

Answer 1

[Walter Roberson]

syms x
fx = x^2 + 2*x + 1

fx = 

p = sym2poly(fx)

p = 1×3

1 2 1

roots(double(p))

ans = 2×1

-1 -1