(4/5n)-(1/10n^3)

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Solution for (4/5n)-(1/10n^3) equation: 


n in (-oo:+oo)

(4/5)*n-((1/10)*n^3) = 0

(-1/10)*n^3+(4/5)*n = 0

4/5*n-1/10*n^3 = 0

1/5*n*(4-1/2*n^2) = 0

-1/2*n^2 = -4 // : -1/2

n^2 = 8

n^2 = 8 // ^ 1/2

abs(n) = 2*2^(1/2)

n = 2*2^(1/2) or n = -(2*2^(1/2))

n/5 = 0

1/5*n = 0 // : 1/5

n = 0

n in { 2*2^(1/2), -(2*2^(1/2)), 0 }

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