solve x^4 - 6x^2 = 7

Complex numbers, rational functions, logarithms, sequences and series, matrix operations, etc.
sanman777
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solve x^4 - 6x^2 = 7

Postby sanman777 » Mon Mar 23, 2009 4:31 pm

solve x^4-6x^2=7

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stapel_eliz
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Postby stapel_eliz » Mon Mar 23, 2009 5:01 pm

sanman777 wrote:solve x^4-6x^2=7

This is an equation in the form of a quadratic:

. . . . .

. . . . .

So factor the above just as you would factor the below:

. . . . .

Then solve the two factors:

. . . . .

Whether you have two solutions or four will depend upon whether you've studied complex numbers yet. :wink:

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


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