Question 605630
I think your problem is the cube root.
Suppose you have {{{ root(3,x) }}}
In order to get rid of the cube root sign,
you should do this: {{{ root(3,x)*root(3,x^2) }}}
That equals {{{ root(3,x^3) = x }}}
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So, for your problem,
{{{ ( 2/(3*root(3,5)) )*( root(3,5^2)/root(3,5^2) ) }}}
{{{ ( 2*root(3,5^2)) / (3*root(3,5^3)) }}}
{{{ ( 2*root(3,25)) / 15 }}}
I checked this punching in numbers:
{{{ root(3,5) = 1.71 }}}
{{{ root(3,25) = 2.924 }}}
It checked out- try it