Mathematics, 29.10.2020 23:40 crodriguez87

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

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