Polynomial evaluation

The peval or polyEval command evaluates polynomials.

peval takes two arguments:
- P, a polynomial given by the list of its coefficients.
- a, a real number.
peval(P,a) returns the exact or numeric value of P(a), calculated using Horner’s method.

peval([1,0,-1],sqrt(2))

√

−1

normal(sqrt(2)*sqrt(2)-1)

peval([1,0,-1],1.4)

0.96