How would I enter √8x^5 to output 2x^2√2x or another problem is (index 3)√81x^10 to output 3x^3 (index 3)√3x ? Thanks for the help.

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- Apr 26th 2008, 09:50 AMrikerTi-89: Solving Radicals?
How would I enter √8x^5 to output 2x^2√2x or another problem is (index 3)√81x^10 to output 3x^3 (index 3)√3x ? Thanks for the help.

- Apr 26th 2008, 09:54 AMMathstud28
- Apr 26th 2008, 10:13 AMriker
Thank you for your response. Well, it’ll 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 don’t know how to enter an index number on the calculator for a radical.

- Apr 26th 2008, 10:14 AMMoo
Hello,

What do you mean by "index number" ? - Apr 26th 2008, 10:16 AMMathstud28
- Apr 26th 2008, 10:19 AMriker
- Apr 26th 2008, 10:20 AMMoo
Yep (I didn't understand at first time), but $\displaystyle \sqrt[n]{x}=x^{\frac 1n}$ (Nod)

- Apr 26th 2008, 10:20 AMMathstud28
- Apr 26th 2008, 10:31 AMriker
I edited my post. If you would, could to take a look at where I went wrong?

- Apr 26th 2008, 10:33 AMMoo
Well this is the right thing...

Though I'm not sure your calculator will give you exactly what you want :

Quote:

3x^3 (index 3)√3x

- Apr 26th 2008, 04:07 PMriker
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?**