Question

Find the exact value of the radical expression in simplest form.√s^8+√25s^8+2√s^8-√s^4
a: 8s^4
b: 28s^4√s
c: 8s-s
d: 28s^4√s-s^4

Answer 1

I'd start by shifting all the perfect squares out of the radicals to get:
s^4+5s^4+2s^4-s^2

Answer 2

8s^4-s^2

Answer 3

I think it is A

Answer 4

Hmm...but A doesn't have the -s^2 part. I wonder why.

Answer 5

@keana is A exactly as you have written it?

Answer 6

@allank yep

Answer 7

Well, I'm for 8s^4-s^2 as the simplest form of the expression. Maybe the question setter made a typo? These things happen :)