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anonymous

  • one year ago

Solve the equation x2 = 81 by finding square root this question is looking for two answers.

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  1. anonymous
    • one year ago
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    ok when you square root something there is always two answers, do you know why?

  2. anonymous
    • one year ago
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    say I am looking at the square root of 16, that is obviously 4 right?

  3. anonymous
    • one year ago
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    Yeah

  4. anonymous
    • one year ago
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    so then could you also do the square root of 4?

  5. anonymous
    • one year ago
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    ok but it could also be -4 do you see what i'm saying?

  6. anonymous
    • one year ago
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    Ohhhhhh yeah okay

  7. anonymous
    • one year ago
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    so this would be positive 9 and negative 9

  8. anonymous
    • one year ago
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    Oh okay thank you!

  9. anonymous
    • one year ago
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    no problem glad to help

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spraguer (Moderator)
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