All zeroes of a real polynomial - Bairstows method

Please specify the degree n of the polynomial:

n =

Important: 1 <= n <= 50 !

zeroes specified	Type here the n zeroes, in any order, but don't forget to provide the complex conjugate if an imaginary part is nonzero. You must write the complex numbers as pairs in parentheses, separated by comma. (1,1),(1,-1),(3,4),(3,-4)
input of coefficients	You must type the coefficients as real numbers in this textarea, beginning with the leading coefficient, separated by comma or blank. The prepared case is for x4+2 x3-2 x2 +2 x -3 . 1,2,-2,2,-3

Do you want a contour plot of |p|?

	contour plot: You need to specify a parameter for the bounding box b >= 0.1, |p| will be shown over the area [remin-b,remax+b] x [immin-b,immax+b], where re/immin, re/immax are the minimal resp. maximal real and imaginary part of the zeroes. b =
	No contourplot

Decide whether to eliminate for odd n a single real root:

	yes
	no

Decide whether to use purging the factors in the original polynomial or not:

	yes
	no

Click on "evaluate", in order to submit your input.