SOLUTION: x4 + 3x2 = -1 solve fro x

SOLUTION: x4 + 3x2 = -1 solve fro x

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Question 726920: x4 + 3x2 = -1 solve fro x
Answer by tanjo3(60) (Show Source): You can put this solution on YOUR website!

Let u be x^2.

Using the quadratic formula:

,
Substitute back u=x^2.
,
, , ,
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