(x^3-27x)/(x^2-5x)

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Solution for (x^3-27x)/(x^2-5x) equation:


D( x )

x^2-(5*x) = 0

x^2-(5*x) = 0

x^2-(5*x) = 0

x^2-5*x = 0

x^2-5*x = 0

DELTA = (-5)^2-(0*1*4)

DELTA = 25

DELTA > 0

x = (25^(1/2)+5)/(1*2) or x = (5-25^(1/2))/(1*2)

x = 5 or x = 0

x in (-oo:0) U (0:5) U (5:+oo)

(x^3-(27*x))/(x^2-(5*x)) = 0

(x^3-27*x)/(x^2-5*x) = 0

x^3-27*x = 0

x*(x^2-27) = 0

1*x^2 = 27 // : 1

x^2 = 27

x^2 = 27 // ^ 1/2

abs(x) = 3*3^(1/2)

x = 3*3^(1/2) or x = -(3*3^(1/2))

x*(x-3*3^(1/2))*(x+3*3^(1/2)) = 0

x^2-5*x = 0

x*(x-5) = 0

x-5 = 0 // + 5

x = 5

x*(x-5) = 0

(x*(x-3*3^(1/2))*(x+3*3^(1/2)))/(x*(x-5)) = 0

( x+3*3^(1/2) )

x+3*3^(1/2) = 0 // - 3*3^(1/2)

x = -(3*3^(1/2))

x = -3*3^(1/2)

( x-3*3^(1/2) )

x-3*3^(1/2) = 0 // + -3*3^(1/2)

x = -(-3*3^(1/2))

x = 3*3^(1/2)

( x )

x = 0

x in { 0}

x in { -3*3^(1/2), 3*3^(1/2) }

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