(28x^7-8x^4)/4x^3

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Solution for (28x^7-8x^4)/4x^3 equation: 


x in (-oo:+oo)

x^3*((28*x^7-(8*x^4))/4) = 0

x^3*((28*x^7-8*x^4)/4) = 0

(x^3*(28*x^7-8*x^4))/4 = 0

28*x^7-8*x^4 = 0

4*x^4*(7*x^3-2) = 0

7*x^3 = 2 // : 7

x^3 = 2/7

x^3 = 2/7 // ^ 1/3

x = (2/7)^(1/3)

4*x^4*(x-(2/7)^(1/3)) = 0

(4*x^3*x^4*(x-(2/7)^(1/3)))/4 = 0

( 4*x^4 )

4*x^4 = 0 // : 4

x^4 = 0

x = 0

( x-(2/7)^(1/3) )

x-(2/7)^(1/3) = 0 // + (2/7)^(1/3)

x = (2/7)^(1/3)

( x^3 )

1*x^3 = 0 // : 1

x^3 = 0

x = 0

x in { 0, (2/7)^(1/3), 0 }

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