Solve Polynomials: f(x)=6 | Mathcad Solutions

[herpamad]

Homework Statement

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

when

f(x) = 6

Homework Equations

Using Mathcad

Polyroots, solve function,

The Attempt at a Solution

I don't know how to paste mathscad, but i can get solution using polyroots for

f(x) = 0

I don't 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 can't 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

 

[cristo]

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

 

[herpamad]

Yeah, your 100% right, thanks for that.

Funny how the simple things always get over-looked.

Thanks a million again