1. The problem statement, all variables and given/known data Solve: x^3 - 9x^2 + 15x + 30 2. Relevant equations 3. The attempt at a solution The factors of 30 are +-1, +-2, +-3, +-5, +-6, +-10, +-15, and +-30. I used my graphing calculator and got a zero close to -1. I plugged it into the original equation and got 5, not 0. I used the zero function on my calculator and found that the zero occurred around -1.13. that's a fraction. How would I solve this algebraically?