Question 707943
Problem: <img src="http://i50.tinypic.com/nf31hz.jpg">


Answer: 


If you take the cube root of anything cubed, the cube root and cube exponent cancel each other out leaving the original number. In other words, {{{root(3,x^3)=x}}} for all values of x.


So {{{root(3,(-4)^3)=-4}}}