I have a rather simple radical expression I'm trying to simplify: cube root of (-8*x^6), where x is assumed positive. I think it is simply -2*x^2, but when I entered it into the calculator, I got (x^2) + (square root of 3*x^2*i). The calculator doesn't seem to be in the habit of lying, and the syntax is entered correctly. Anyone know what I'm missing here? Thanks in advance