montielkelsey654 montielkelsey654 16-08-2017 Mathematics contestada Use the grouping method to factor the polynomial completely. 9x^9-24x^5-12x^4 A. 3x^4(3x^5-8x^2-4x) B. 3x^4(3x^5-8x-4) C. 3x^9(3x^5-8x-4) D. 3x^9(3x^5-8x^2-4x)