## anonymous 5 years ago the equation is 4r[2]-2r=0 [2] Means square root in the equation

1. anonymous

r=0

2. anonymous

$$4r^2-2r=0$$, take 2r as a common factor, you get $$2r(2r-1)=0$$. So r is either $$0$$ or $$1/2$$.

3. anonymous

[2] is square root.

4. anonymous

Is the question, $4r \sqrt{2} - 2r =0$

5. anonymous

Yes that is the question

6. anonymous

Whoops, sorry for the misunderstanding :D

7. anonymous

It's ok

8. anonymous

So if you take out r, the only possibility is r=0

9. anonymous

Thank you very much for your help!!

10. anonymous

welcome :)