Thank you for your response. Well, itíll only accept it as expand(√(8x^5)) and the output is then 2^3/2√x^5 instead of the answer in my lecture notes. Also, I still donít know how to enter an index number on the calculator for a radical.
Well this is the right thing...
Though I'm not sure your calculator will give you exactly what you want :
Calculator has to be a tool, not a solver
The calculator is clearly solving but it is displaying one of two possible outputs for radicals. You said so yourself that you're not sure whether both can be displayed using certain methods or not. Now, the question becomes is there a way to get √8x^5 to output as 2x^2√2x on a Ti-89 calculator?