Find Factors of Fourth Degree (x^4) Trinomials - Easy Substitution Method

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What I love about this Math Channel is that the Professor is consistently great! In each video, there is a thorough explanation and incredible diligence! Keep up the great job, PreMath!

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u - 5 = 0
u = 5
x^(2) = 5
x = Square root of 5

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