## Diana.xL one year ago help?

1. Diana.xL
2. zzr0ck3r

Post the question where you put "help?"

3. zzr0ck3r

and ideas?

4. Diana.xL

my answer is b. but im confused.

5. anonymous

Yeah, B is the answer. What confuses you?

6. zzr0ck3r

almost, you do want to square root both sides, but when we induce the square, we get a positive and negative answer.

7. zzr0ck3r

8. Diana.xL

oh right

9. anonymous

If 16 is X squared, then X is the square root of 16. Ok, now I'm confused.

10. Diana.xL

so it would be c yea?

11. anonymous

I swear it's B!

12. zzr0ck3r

i.e. $(-4)^2=(-4)(-4)=16=4*4=4^2=$

13. anonymous

Confusion is occuring.

14. anonymous

I don't know what I'm doing it appears. I'm just gonig to go because this seems to be much more complicated than I thought :I

15. zzr0ck3r

the answer to $$x=\sqrt{16}$$ is $$x=4$$ The answer to $$x^2=16$$ is $$x=\pm 4$$

16. zzr0ck3r

@FitzIncorporated it is a common mistake. when we write $$\sqrt{something}$$ we mean the positive square root(just like if we write 1). But when we induce a square (when we take square root of both sides) we get two answers. In other words, the square root of 4 is 2 but there are two answers if I ask you what number squared is 4, they are 2 and -2

17. Diana.xL

so its c? its lagging a bit

18. CGGURUMANJUNATH

C

19. Diana.xL

okTy :)

20. anonymous

@zzr0ck3r Thank you :)

21. zzr0ck3r

for sure :)

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