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cbrusoe

  • 3 years ago

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

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  1. JamesWolf
    • 3 years ago
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    so you want to get the x on its own. try subtracting 121 from both sides first

  2. cbrusoe
    • 3 years ago
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    104

  3. JamesWolf
    • 3 years ago
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    yeah, x^2 = 104

  4. JamesWolf
    • 3 years ago
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    now you need to get rid of the ^2

  5. cbrusoe
    • 3 years ago
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    mmk how do i do that?

  6. mickey4691
    • 3 years ago
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    what is the opposite of ^2?

  7. JamesWolf
    • 3 years ago
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    okay well whats the opposite of squaring something?

  8. mickey4691
    • 3 years ago
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    remember it's \[\pm \sqrt{104}\]

  9. cbrusoe
    • 3 years ago
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    ooh nevermind went blank i would square root it making x = 10.2 right

  10. CheetahBooks1
    • 3 years ago
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    121+x^2=225 -121 -121 x^2=104 square root x square root 104 X=10.2 approximately

  11. JamesWolf
    • 3 years ago
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    yeah awesome :)

  12. cbrusoe
    • 3 years ago
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    =) thank-you guys!!

  13. mickey4691
    • 3 years ago
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    but it's gonna be a positive or negative 10.2

  14. CheetahBooks1
    • 3 years ago
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    Aww man! she got it! oh well, congratulations! That's how you would show your work.

  15. cbrusoe
    • 3 years ago
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    positive right...

  16. cbrusoe
    • 3 years ago
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    lol thanks =)

  17. CheetahBooks1
    • 3 years ago
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    It can actually be positive and negative!

  18. JamesWolf
    • 3 years ago
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    could be either, but i doubt your teacher will care at this stage

  19. mickey4691
    • 3 years ago
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    it can be positive and negative check it wit the calculator yu shud use positive for now

  20. cbrusoe
    • 3 years ago
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    haha yeahh i got it right =) thanks again all of you

  21. CheetahBooks1
    • 3 years ago
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    You are welcome!

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