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OpenStudy (anonymous):
Solve x^4 + x^2 – 2 = 0.
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OpenStudy (solomonzelman):
\[Let~~x^2=a\]\[a^2+a-2=0\]GO!
OpenStudy (solomonzelman):
Can you solve for a using a quadratic formula, by factoring, or by completing the square? when you solve for a, lug in the answer you get for a (instead of a) into x^2=a
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