X3/4=-20 - solution

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Solution for X3/4=-20 equation:

X in (-oo:+oo)

(X^3)/4 = -20 // + 20

(X^3)/4+20 = 0

1/4*X^3 = -20 // : 1/4

X^3 = -80

X^3 = -80 // ^ 1/3

X = -2*10^(1/3)

X = -2*10^(1/3)

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