SOLUTION: I've tried working this problem on my own, then checking my answer with both a solver and a scientific calculator and the 2 answers are sooo far apart something's got to be very wr

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Question 453046: I've tried working this problem on my own, then checking my answer with both a solver and a scientific calculator and the 2 answers are sooo far apart something's got to be very wrong. The problem is
Evaluate the function at the given values of x if possible. (a)x=4 (b)x=-5
f(x)=6x^2-1/x^2
I get F(4)=47/16 and f(5)=-31/-25 and I get f(4)=1535/16 and f(-5)=3749/25 from the solvers.
Can someone tell me which is right or if its another answer entirely? I have a couple more problems like this coming up. This is an important test and it's no time for guessing. Thanks.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The problem is
Evaluate the function at the given values of x if possible. (a)x=4 (b)x=-5
:
I am not sure of any of your solutions:
:
Assuming this is the problem and x=4
f(x)= %286x%5E2-1%29%2Fx%5E2 = %286%284%5E2%29-1%29%2F4%5E2 = %286%2816%29-1%29%2F16 = %2896-1%29%2F16 = 95%2F16
:
x=-5
f(x)= %286%28-5%5E2%29-1%29%2F-5%5E2 = %286%2825%29-1%29%2F25 = %28150-1%29%2F25 = 149%2F25
:
When you entered this problem into the solver, did you put 6x^2-1 in brackets ()?