## anonymous 3 years ago 121+x^2=225 what does x equal?

1. anonymous

so you want to get the x on its own. try subtracting 121 from both sides first

2. anonymous

104

3. anonymous

yeah, x^2 = 104

4. anonymous

now you need to get rid of the ^2

5. anonymous

mmk how do i do that?

6. anonymous

what is the opposite of ^2?

7. anonymous

okay well whats the opposite of squaring something?

8. anonymous

remember it's $\pm \sqrt{104}$

9. anonymous

ooh nevermind went blank i would square root it making x = 10.2 right

10. anonymous

121+x^2=225 -121 -121 x^2=104 square root x square root 104 X=10.2 approximately

11. anonymous

yeah awesome :)

12. anonymous

=) thank-you guys!!

13. anonymous

but it's gonna be a positive or negative 10.2

14. anonymous

Aww man! she got it! oh well, congratulations! That's how you would show your work.

15. anonymous

positive right...

16. anonymous

lol thanks =)

17. anonymous

It can actually be positive and negative!

18. anonymous

could be either, but i doubt your teacher will care at this stage

19. anonymous

it can be positive and negative check it wit the calculator yu shud use positive for now

20. anonymous

haha yeahh i got it right =) thanks again all of you

21. anonymous

You are welcome!