## Online Course Discussion Forum

### MC III Chapter 3 Algebra Help

MC III Chapter 3 Algebra Help

Hi,

I’m having trouble with 3.24 on the hw. I attached my work below. I think I got the answer but I used trial-and-error. Can you please give me a hint on how to solve it algebraically? Thanks!

Re: MC III Chapter 3 Algebra Help

Don't raise to the 6th power.  Cube first, and then see if you can isolate the radical and square it.

Also, you may try change of variables: each of the radicals can be represented by one variable, and see where that takes it.