(x^4/7)-9x

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Solution for (x^4/7)-9x equation: 


x in (-oo:+oo)

(x^4)/7-(9*x) = 0

(x^4)/7-9*x = 0

1/7*x^4-9*x = 0

x*(1/7*x^3-9) = 0

1/7*x^3 = 9 // : 1/7

x^3 = 63

x^3 = 63 // ^ 1/3

x = 63^(1/3)

x = 0

x = 0

x in { 63^(1/3), 0 }

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