Question

121+x^2=225 what does x equal?

Answer 1

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

Answer 2

104

Answer 3

yeah, x^2 = 104

Answer 4

now you need to get rid of the ^2

Answer 5

mmk how do i do that?

Answer 6

what is the opposite of ^2?

Answer 7

okay well whats the opposite of squaring something?

Answer 8

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

Answer 9

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

Answer 10

121+x^2=225
-121 -121
x^2=104
square root x square root 104

X=10.2 approximately

Answer 11

yeah awesome :)

Answer 12

=) thank-you guys!!

Answer 13

but it's gonna be a positive or negative 10.2

Answer 14

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

Answer 15

positive right...

Answer 16

lol thanks =)

Answer 17

It can actually be positive and negative!

Answer 18

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

Answer 19

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

Answer 20

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

Answer 21

You are welcome!