## anonymous one year ago How do you simplify √(8x - 4 )?

1. ganeshie8

looks you can factor 4 and pull it out of the radical

2. anonymous

so I would substitute -1 x 4?

3. ganeshie8

not sure what you mean, can u do it and show me what you get

4. anonymous

Ok forget the radical for a second and factor this: 8x-4

5. anonymous

√(8x - 4) √(8x -(1x4) ?

6. ganeshie8

looks good, keep going

7. anonymous

eek no: take out the 4- 4(2x-1) So now put that under the radical and you can take out the 4 right?

8. anonymous

does that make sense?

9. anonymous

not really

10. anonymous

√(8x - 4) √(8x -(1x4) 2√(8x)?

11. anonymous

No, you don't ever get that. You get 8x-4 = 4(2x-1)

12. anonymous

And then you get 2 * sqrt(2x-1)

13. anonymous

i understand I think

14. anonymous

$2 * \sqrt{2x-1}$ ok then that is basically the farthest you can simplify, have i helped?

15. anonymous

unless you have answer choices that say otherwise

16. anonymous

yes, but what if I have a larger problem like √11x - 6 ? how would the factoring work then?

17. TheSmartOne

^ For that type of question, there would be no factoring to it... If they gave that equal to something, then we could solve for x, but factoring is a no.