Question 771461
{{{root(3,54m^9n^4 (m+n)^5)=root(3,(27m^9n^3 (m+n)^3)*(2n(m+n)^2))=root(3,(27m^9n^3 (m+n)^3))*root(3,2n(m+n)^2)=3m^3n(m+n)*root(3,2n(m+n)^2)}}}