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

104

yeah, x^2 = 104

now you need to get rid of the ^2

mmk how do i do that?

what is the opposite of ^2?

okay well whats the opposite of squaring something?

remember it's \[\pm \sqrt{104}\]

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

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

yeah awesome :)

=) thank-you guys!!

but it's gonna be a positive or negative 10.2

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

positive right...

lol thanks =)

It can actually be positive and negative!

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

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

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

You are welcome!