SOLUTION: I'm supposed to evaluate this function and I can't figure it out. f(x)=4x^2-1/x^2 (a) x=5 (b) x=-5 I keep coming up with (2x^2-1)(2x^2+1)/x^2 and it's wrong. Can someone

SOLUTION: I'm supposed to evaluate this function and I can't figure it out. f(x)=4x^2-1/x^2 (a) x=5 (b) x=-5 I keep coming up with (2x^2-1)(2x^2+1)/x^2 and it's wrong. Can someone

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Question 447989: I'm supposed to evaluate this function and I can't figure it out.
f(x)=4x^2-1/x^2 (a) x=5 (b) x=-5
I keep coming up with
(2x^2-1)(2x^2+1)/x^2
and it's wrong. Can someone help please?
Answer by rwm(914) (Show Source): You can put this solution on YOUR website!
You aren't supposed to factor it. You are supposed to evaluate it.
Plug 5 in for x and find f(5)
then plug in -5 for x and find f(-5)
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