SOLUTION: What substitution should be used to rewrite 4x4 � 21x2 + 20 = 0 as a quadratic equation?

SOLUTION: What substitution should be used to rewrite 4x4 � 21x2 + 20 = 0 as a quadratic equation?

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Question 945695: What substitution should be used to rewrite 4x4 � 21x2 + 20 = 0 as a quadratic equation?

Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
4x4�21x2+20=0

Use proper text notation.
4x^4�21x^2+20=0

That will appear rendered as

Use any preferred different variable, .
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