HP 40G manual Polynomial functions, Polycoef, Polyeval, Polyform, Polyroot

Polynomial functions

	Polynomials are products of constants (coefficients) and
	variables raised to powers (terms).
POLYCOEF	Polynomial coefficients. Returns the coefficients of the
	polynomial with the specified roots.
	POLYCOEF ([roots])
	Example
	To find the polynomial with roots 2, –3, 4, –5:
	POLYCOEF([2,-3,4,-5]) returns[1,2,-25,
	-26,120], representing x4+2x3–25 x2–26 x+120.
POLYEVAL	Polynomial evaluation. Evaluates a polynomial with the
	specified coefficients for the value of x.
	POLYEVAL([coefficients],value)
	Example
	For x4+2x3–25 x2–26 x+120:
	POLYEVAL([1,2,-25,-26,120],8) returns
	3432.
POLYFORM	Polynomial form. Creates a polynomial in variable1 from
	expression.
	POLYFORM(expression,variable1)
	Example
	POLYFORM((X+1)^2+1,X) returns X^2+2*X+2.
POLYROOT	Polynomial roots. Returns the roots for the nth-order
	polynomial with the specified n+1 coefficients.
	POLYROOT([coefficients])
	Example
	For x4+2x3–25 x2–26 x+120:
	POLYROOT([1,2,-25,-26,120]) returns
	[2,-3,4,-5].

10-12 Using mathematical functions