-5x^-3=25/40

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Solution for -5x^-3=25/40 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

-5*x^-3 = 25/40 // - 25/40

-5*x^-3-(25/40) = 0

-5*x^-3-5/8 = 0

-5*x^-3 = 5/8 // : -5

x^-3 = -1/8

-3 < 0

1/(x^3) = -1/8 // * x^3

1 = -1/8*x^3 // : -1/8

-8 = x^3

x^3 = -8 // ^ 1/3

x = -2

x = -2

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