Discussion

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

(A)0
(B)...
(C)...
(D)...
(E)...
(F)...
*This question is included in Nova Math - Problem Set A: Substitution, question #14

The solution is

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!!!
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Contributor
Posted: 09/02/2012 18:15
Jagathi, try doing it more slowly. If you plug in 1, you get 1 - 2, which is -1.
Posted: 06/20/2013 10:11
Lily*
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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