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What substitution should be used to rewrite 4x^4-21x^2+20 =0 as a quadratic equation

What substitution should be used to rewrite 4x^4-21x^2+20 =0 as a quadratic equation
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4 votes
What substitution should be used to rewrite 4x^4-21x^2+20 =0 as a quadratic equation

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User Navid Khan
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8.6k points

1 Answer

5 votes

I would substitute y = x^2

4y^2 -21y+20=0

answered
User Keif Kraken
by
7.9k points
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