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Which one of the following is a solution to the equation x4 − 2x2 ... ...

Which one of the following is a solution to the equation x4 − 2x2 = −1 ?


(A) 0
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Problem Set A: Substitution

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Posted: 09/02/2012 10:46
How do u do this question? It seems so confusing using the numbers provided! The larger the number the more value the difference is! I tried 1 but it gave me the difference of -3 not -1!!!
Contributor
 
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Posted: 09/02/2012 18:15
Jagathi, try doing it more slowly. If you plug in 1, you get 1 - 2, which is -1.
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Posted: 06/20/2013 10:11
Lily*
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Posted: 09/02/2012 22:45
Thank you.. I thought that the exponent was for 2x not just x thanks for explaining this to me! :)
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