SOLUTION: Find the sum of the roots of the equation: x^4-13x^2+36=0

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Question 801929: Find the sum of the roots of the equation:
x^4-13x^2+36=0
Answer by solver91311(24713) About Me  (Show Source):
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Use the substitution , solve for , then substitute back , and solve each of the resulting equations for . This is a 4th degree polynomial equation so there must be 4 roots, counting all multiplicities.

John

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