Question 1133460
Factorize each of them completely if you are not sure, and you can see which is and which is not.



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{{{9b^27}}}

{{{3^2*y^(3)y^3*y^3}}}

not a perfect cube, because part of it is but another part is not.



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{{{8c^9}}}

{{{2^(3)*c^3*c^3*c^3}}}

{{{(2c^3)^3}}}

this was a perfect cube.