SOLUTION: I am taking college algebra and I am having a hard time understanding the problem. Here's the problem: Solve the equation by making an appropriate substitution: x^4-9x^2=-20. Help
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Question 701956: I am taking college algebra and I am having a hard time understanding the problem. Here's the problem: Solve the equation by making an appropriate substitution: x^4-9x^2=-20. Help me!!! Answer by solver91311(24713) (Show Source):
Solve the quadratic for . Then substitute back into each of the expressions for the value of giving you two additional quadratics. Solve each for over the complex numbers. Note: In accordance with the Fundamental Theorem of Algebra, you will ultimately have four zeros for the 4th degree polynomial equation.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
