numpy.polysub() in Python Last Updated : 29 Nov, 2018 Summarize Comments Improve Suggest changes Share Like Article Like Report numpy.polysub() :This function helps to find the difference of two polynomials and then returning the result as a polynomial. Each input polynomial must be a sequence of polynomial coefficients, from highest to lowest degree. Parameters : p1 : Input polynomial 1 : 1x + 2. p2 : Input polynomial 2 : 9x2 + 5x + 4 Return: Difference of polynomials : (0-9)x2 + (1-5)x + (2-4) Python3 1== # Python code explaining # numpy.polysub () # importing libraries import numpy as np p1 = np.poly1d([1, 2]) p2 = np.poly1d([9, 5, 4]) print ("P1 : ", p1) print ("\nP2 : \n", p2) a = np.polysub(p1, p2) print ("\nP1 - P2 : \n", a) Output: P1 : 1 x + 2 P2 : 2 9 x + 5 x + 4 P1 - P2 : 2 -9 x - 4 x - 2 Comment More infoAdvertise with us Next Article numpy.polysub() in Python M mohit gupta_omg :) Follow Improve Article Tags : Python Python-numpy Python numpy-polynomials Practice Tags : python Similar Reads numpy.poly() in Python The numpy.poly() function in the Sequence of roots of the polynomial returns the coefficient of the polynomial. Syntax :numpy.poly(seq) Parameters : Seq : sequence of roots of the polynomial roots, or a matrix of roots. Return: 1D array having coefficients of the polynomial from the highest degree t 2 min read numpy.polymul() in Python The numpy.polymul() method evaluates the product of two polynomials and returns the polynomial resulting from the multiplication of two input polynomials 'p1' and 'p2'. Syntax : numpy.polymul(p1, p2) Parameters : p1 : [array_like or poly1D]Input polynomial 1. p2 : [array_like or poly1D]Input polynom 1 min read numpy.poly1d() in Python The numpy.poly1d() function helps to define a polynomial function. It makes it easy to apply "natural operations" on polynomials. Syntax: numpy.poly1d(arr, root, var) Parameters : arr : [array_like] The polynomial coefficients are given in decreasing order of powers. If the second parameter (root) i 3 min read numpy.polyval() in Python numpy.polyval(p, x) method evaluates a polynomial at specific values. If 'N' is the length of polynomial 'p', then this function returns the value Parameters : p : [array_like or poly1D] polynomial coefficients are given in decreasing order of powers. If the second parameter (root) is set to True th 2 min read numpy.polydiv() in Python The numpy.polydiv() method evaluates the division of two polynomials and returns the quotient and remainder of the polynomial division. Syntax : numpy.polydiv(p1, p2) Parameters : p1 : [array_like or poly1D]Coefficients of dividend polynomial. p2 : [array_like or poly1D]Coefficients of divisor polyn 1 min read Like