pq

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pq is a rational roots finder for polynomial equations;

UPDATE: pq now supports rational coefficients!

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Example

Enter the polynomial coefficients in decreasing power as arguments to the program

$ # solve a polynomial equation in degree 8
$ ./pq 1 -28 322 -1960 6769 -13132 13068 -5040 0
Rational roots:
7
6
5
4
3
2
1
0

Rational coefficients!

pq now supports rational coefficients in polynomial equations

$ # solve a polynomial equation with rational coefficients
$ ./pq 1 1 1/4
Rational roots:
-1/2