f(x)=... determining zeros of an equation

[Math wiz ya rite 09]

Heres the problem:

f(x)= (2x^3+2x^2-23x+20)/(2x^3+2x^2-71x+140)

#1: Determine all zeros of f(x)

#2: Determine all values of x for which f is not defined.

At the moment I'm not sure how to solve this problem. I think it has something to do with sumplifying maybe crossing something out from the numerator and denominator.

Could someone please explain how to solve this and not only give me the answer if possible.

Thanks,
Daniel

 

[stapel]

1) Hint: A fraction is zero when the numerator is zero.

2) Hint: Division by zero is not defined.

Eliz.