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31-01-2022
Mathematics

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Find all solutions of this equation by factoring.
x^4-20x^2+64=0

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Xignerso Xignerso

31-01-2022

[tex]Rewrite \: x¹ \: as (x²)²[/tex]

[tex](x²)² - 20x² + 64 = 0[/tex]

[tex]Let \: u = ² Substitute \: u \: for \: all \: occurrences \: of \: x²[/tex]

[tex]u² - 20u +64 = 0[/tex]

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