Question 333624
I'm assuming you mean simplify {{{root(3,7)*root(9,7)}}}



If so, then {{{root(3,7)*root(9,7)=(7^(1/3))*(7^(1/9)^"")=(7^(3/9))*(7^(1/9)^"")=7^(3/9+1/9)=7^(4/9)=root(9,7^4)=root(9,2401)}}}



So {{{root(3,7)*root(9,7)=root(9,2401)}}}