SOLUTION: a partial solution set is given for each equation. Find complete solution set: x^3 + 3x^2 - 13x -15 =0 {-1} i keep getting 1 -2 -13 and -4 as the ansers for each when i subr

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: a partial solution set is given for each equation. Find complete solution set: x^3 + 3x^2 - 13x -15 =0 {-1} i keep getting 1 -2 -13 and -4 as the ansers for each when i subr      Log On


   



Question 534249: a partial solution set is given for each equation. Find complete solution set:
x^3 + 3x^2 - 13x -15 =0 {-1}
i keep getting 1 -2 -13 and -4 as the ansers for each when i subract. What am i doing wrong??
the answer is {-1,-5,3} and im not even close

Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
Graphing a function helps.
graph%28500%2C500%2C-10%2C10%2C-50%2C50%2Cx%5E3%2B3%2Ax%5E2-13%2Ax-15%29