SOLUTION: I need help with this question: find all the zeros of the function x^3+3x^2-x+12. How do I do this?

Question 86377: I need help with this question: find all the zeros of the function x^3+3x^2-x+12. How do I do this?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find all the zeros of the function x^3+3x^2-x+12
The rational candidates are +-1,+-2,+-3,+-4,+-6,+-12.
---------
Use synthetic division or graphing to find the 1st zero.
Graphing I find a zero at x=-3.989362 which leads me to
think you have posted the problem incorrecly.
---------
Cheers,
Stan H.
RELATED QUESTIONS
I need help with this question and I have absolutely no clue how to do it. It states:... (answered by stanbon)

I need help with this homework question: Find the standard form of the function... (answered by jim_thompson5910)

How do I find "all real zeros" of the function? f(x) =... (answered by psbhowmick)

f(x)= x^3+9x^2-4x-36 this problem is to find all the real zeros of the function, but... (answered by Alan3354)

Hello I need some help with this problem: {{{4x^5-3x^3}}} I need to factor it into... (answered by astromathman)

Please help with this problem: Find all zeros of f: f(x) = 3x^2 + 5x - 2 I believe you... (answered by jim_thompson5910)

f(x)=x^4+2x^3+x^2+8x-12 I need to find all of the actual zeros of this function,... (answered by ikleyn,Boreal,MathLover1,MathTherapy)

Can someone help me with this? Thank you. I need to find all the zeros of the function... (answered by ikleyn)

I have tried this question for the past hour and I am so lost now that nothing is... (answered by stanbon)