Question 89625
Simplify:
{{{sqrt(81x^12y^8z^10)}}} Factor the contents of the radical and rewrite as:
{{{sqrt((9*9)(x^6)(x^6)(y^4)(y^4)(z^5)(z^5)) = sqrt(9^2(x^6)^2(y^4)^2(z^5)^2)}}} 
Now take the square root of the squared quantities:
{{{9x^6y^4z^5}}} ...and there it is!