SOLUTION: 5x^6 – 8x^3 = 4

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Question 1089503: 5x^6 – 8x^3 = 4
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.
Introduce new variable y = x^3. Then your equation takes the form

5y^2 - 8y = 4.


5y^2 - 8y - 4 = 0,


 =  =  = .


1.   =  = 2  ====>  x^3 = 2  ====>  x = .


2.   =  =   ====>   x^3 = -0.4  ====>  x = .

Solved.


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