81x^7+63x^2-18x/9x

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Solution for 81x^7+63x^2-18x/9x equation: 


x in (-oo:+oo)

81*x^7+63*x^2-(((18*x)/9)*x) = 0

81*x^7+63*x^2-2*x^2 = 0

81*x^7+(63-2)*x^2 = 0

x^2*(81*x^5-2+63) = 0

81*x^5 = -(63-2) // : 81

x^5 = (2-63)/81

x^5 = (2-63)/81 // ^ 1/5

x = ((2-63)^(1/5))/(81^(1/5))

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in { ((2-63)^(1/5))/(81^(1/5)), 0 }

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