Some one help?
simplify the radical expression. sqrt (42a^8)

Question

Some one help?
simplify the radical expression. sqrt (42a^8)

chantysquirrel1129** · Answer

I got $$a ^{4}\sqrt{42}$$........don't know if that's what you wanted. :p

green_1 · Answer

a^4sqrt(42)

mrnebula · Answer

Thats not one of the answers. plus I need some one to explain so I can do this stuff my self

green_1 · Answer

@ganeshie8

chantysquirrel1129** · Answer

Well this is how:

$$\sqrt{42a ^{8}}= \sqrt{42} \sqrt{a ^{8}}$$
right?

so $$\sqrt{4^{8}}= a ^{4}$$

and put it together

chantysquirrel1129** · Answer

Sorry , I meant $$\sqrt{a ^{8}}$$
not
$$\sqrt{4^{8}}$$

chantysquirrel1129** · Answer

Put them together, and you get:

$$a ^{4}\sqrt{42}$$

chantysquirrel1129** · Answer

Like this: $$a \sqrt{24.5}$$

$$7a ^{8}$$

$$7a ^{4}$$

$$7\sqrt{5a ^{8}}$$



and it's not that I got the answer wrong, there's just many ways to simplify it :p

chantysquirrel1129** · Answer

are those the correct answer choices or nope? :3

mrnebula · Answer

Yes

mrnebula · Answer

So is it A then? cuz idk what $$a ^{4}\sqrt{42}$$ is

chantysquirrel1129** · Answer

Well this is different...


ok let me think. 


This question has weird answer choices.

My best guess would be D :o