The question is f(x^{2})=-x^{2}+5x-2 So I plugged in the X^{2} as X and got -x^{4}+5x^{2}-2 but the multiple choice only has -4^{4}+x^{2}-2, and if the multiple choice is correct what happened to the 5?
The question is f(x^{2})=-x^{2}+5x-2 So I plugged in the X^{2} as X and got -x^{4}+5x^{2}-2 but the multiple choice only has -4^{4}+x^{2}-2, and if the multiple choice is correct what happened to the 5?
Last edited by evking; 09-26-2017 at 12:10 PM.
The question says " Polynomial Functions are shown below, plug in the following values as X to get the output values."
I know for sure that -x^{4}+x^{2}-2 is the answer that is considered correct for that problem because it was graded as correct I am just curious why it is considered correct instead of -x^{4}+5x^{2}-2. Hope that helps.
As a spin off from Bob Brown's post:
Two things:
(1) Is the original polynomial
f(x) = -x^{2}+5x-2
so that, in reality,
f(x^{2}) = -x^{4}+5x^{2}-2
(2) If that is the original polynomial 'printed in the book' it looks like maybe a typo and it should have been
f(x) = -x^{2}+x-2
so that
f(x^{2}) = -x^{4}+x^{2}-2
-Ishuda
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