Question

How do you simplify √(8x - 4 )?

Answer 1

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

Answer 2

so I would substitute -1 x 4?

Answer 3

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

Answer 4

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

Answer 5

√(8x - 4)
√(8x -(1x4)
?

Answer 6

looks good, keep going

Answer 7

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

Answer 8

does that make sense?

Answer 9

not really

Answer 10

√(8x - 4)
√(8x -(1x4)
2√(8x)?

Answer 11

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

Answer 12

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

Answer 13

i understand I think

Answer 14

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

Answer 15

unless you have answer choices that say otherwise

Answer 16

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

Answer 17

^ 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.