solve x^4-6x^2=7

- stapel_eliz
**Posts:**1687**Joined:**Mon Dec 08, 2008 4:22 pm-
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sanman777 wrote:solve x^4-6x^2=7

This is an equation

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So factor the above just as you would

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Then solve the two factors:

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Whether you have two solutions or four will depend upon whether you've studied

If you get stuck, please reply with a clear listing of your work and reasoning so far. Thank you!