### 2.24.8 Evaluation of a polynomial : `peval polyEval`

`peval` or `polyEval` takes as argument a polynomial `p` given by the list of its coefficients and a real `a` .
`peval` or `polyEval` returns the exact or numeric value of `p(a)` using Horner algorithm.
Input :

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

Output :

`sqrt(2)*sqrt(2)-1`

Then :

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

Output :

`1`

Input :

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

Output :

`0.96`