Polynomial problem is: degree 3 polynomial that goes through (5, -12.6) find the polynomial. Any ideas?

Question

goformit100 · Answer

|dw:1364746117425:dw|

anonymous · Answer

There are only so many possible answers to this :D

anonymous · Answer

Did that an the answer I got the math system says is wrong. My answer was: f(x) = x^3(x+2)^2(x-2)

anonymous · Answer

Thing is, when you let x = 5, f(x) has to be equal to -12.6

mertsj · Answer

f(x)=ax^3
-12.6=a(5)^3
a=-.1008
f(x=-.1008x^3

anonymous · Answer

$$\large f(x)=-0.1x^3-0.1=-\frac{x^3+1}{10}$$

anonymous · Answer

According to WEBwork that is not the correct answer.

mertsj · Answer

It is probably a simple matter of the form.  What do the directions say about entering answers?

anonymous · Answer

The = sign cannot be used as it is an unacceptable character

mertsj · Answer

No other directions?  How does it say to enter fractions?

anonymous · Answer

use the division sign for fractions /