# SOLUTION: I need help with this problem. solve x^4+10x^2+9=0 Thank you!

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 Click here to see ALL problems on Quadratic Equations Question 481460: I need help with this problem. solve x^4+10x^2+9=0 Thank you!Answer by Earlsdon(6287)   (Show Source): You can put this solution on YOUR website!You can use a temporary substitution in which , so... Substitute Factor. Apply the "zero product" rule. or so that... or Now replace the temporary variable z with to get: or and so... , , or , But these can be simplified to... , or , where