// End script hiding -->

Hi, x^4+9x^3+12x^2-11x+21=0 |Note: -3 is a root using Synthetic Divsion -3 1 9 12 -11 21 -3 -18 18 -21 1 6 -6 7 0 yields: x^3 + 6x^2 - 6x + 7 = 0 |Note: -7 is a root using Synthetic Divsion -7 1 6 -6 7 -7 7 -7 1 -1 1 0 yields: x^2 - x + 1 = 0