Question

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

Answer 1

4x4–21x2+20=0

Use proper text notation.

4x^4–21x^2+20=0

That will appear rendered as

4x%5E4-21x%5E2%2B20=0

Answer 2

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