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Posted by **Maddy** on Thursday, June 23, 2011 at 10:24pm.

X^(4/3)+X^(2/3)=28

- Pre-Calc -
**Bosnian**, Thursday, June 23, 2011 at 11:50pmIn google type:

wolfram alpha

When you see list of results click on:

Wolfram Alpha:Computational Knowledge Engine

When page be open in rectangle type:

solve x^(4/3)+x^(2/3)=28

and click option =

After few seconds you will see solution.

Then click option:

Show steps

- Pre-Calc -
**Reiny**, Friday, June 24, 2011 at 7:24amlet x^(2/3) = y

then we have

y^2 + y - 28 = 0

y = (-1 ± √113)/2

so x^(2/3) = (1+√113)/2

x = [(1 + √113)/2]^(3/2) = appr. 10.566

or x^(2/3) = (-1 - √113)/2 , which has no solution

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