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5.29.18  List of factors: factors

factors has either a polynomial or a list of polynomials as argument.
factors returns a list containing the factors of the polynomial and their exponents.
Input:

factors(x^2+2*x+1)

Output:

[x+1,2]

Input:

factors(x^4-2*x^2+1)

Output:

[x+1,2,x-1,2]

Input:

factors([x^3-2*x^2+1,x^2-x])

Output:

[[x-1,1,x^2-x-1,1],[x,1,x-1,1]]

Input:

factors([x^2,x^2-1])

Output:

[[x,2],[x+1,1,x-1,1]]

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