# Solve Polynomials

1. Feb 22, 2009

1. The problem statement, all variables and given/known data

$$f(x) = x^3 + x^2 - 11x^2 -9x +18$$

when

$$f(x) = 6$$

2. Relevant equations

Polyroots, solve function,

3. The attempt at a solution

I dont know how to paste mathscad, but i can get solution using polyroots for

$$f(x) = 0$$

I dont know how to modify the mathscad code so that i can get

$$f(x) = 6$$

I know how to use the basic root, polyroot and solve functions.

I have done an X/Y graph, but cant seem to get 6 on the y axis, always a little over or under.

Help is really, really appreciated, needed a.s.a.p,

Thanks

2. Feb 22, 2009

### cristo

Staff Emeritus
Why not try and solve $$f(x)-6=0$$?

3. Feb 22, 2009