factor the polynomial: 6x^5-51x^3-27x
6x^5-51x^3-27x take out the GCF first (3x)
(3x)(2x^4 - 17x^2 - 9 ) =
(3x)(2x^2 + 1)(x^2 - 9) =
(3x)(2x^2 + 1)(x + 3)(x - 3)