What is the simplified numerator for the given function?

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The discussion centers on simplifying the numerator of a rational function. The correct simplified form of the numerator is identified as \(4(3x^2 + 1)\), which is derived from the original expression \(12x^2 + 4\). Participants emphasize the importance of factoring out common elements with the denominator, specifically noting the denominator's form as \((x^2 - 1)^3\). The consensus suggests that the preferred answer for clarity and mathematical accuracy is \(4(3x^2 + 1)\).

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View attachment 7529

I have most of this question figured out, but I don't understand what this one question is asking? Anyone know?

thanks <3
 

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You've correctly factored the numerator, but you still need to divide out any factors in common with the denominator...
 
MarkFL said:
You've correctly factored the numerator, but you still need to divide out any factors in common with the denominator...

So my answer would just be 12x^2 + 4? I'm on my last attempt
 
hannahSUU said:
So my answer would just be 12x^2 + 4? I'm on my last attempt

Yes, I would reduce this to (and factor the numerator a bit more):

$$f''(x)=\frac{4\left(3x^2+1\right)}{\left(x^2-1\right)^3}$$

I have no idea whether your homework software will accept both $12x^2+4$ and $4\left(3x^2+1\right)$, but I would prefer the latter if working the problem myself.
 

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