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laurenn_marie7

  • one year ago

x^2-81=0

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  1. GaLm
    • one year ago
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    factor or solve for x?

  2. laurenn_marie7
    • one year ago
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    solve

  3. ZeHanz
    • one year ago
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    Then first factor, then solve ;)

  4. Fgcbear16
    • one year ago
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    |dw:1360688492604:dw|

  5. ZeHanz
    • one year ago
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    Hey @GaLm, just throwing in solutions isn't very helpful!

  6. Fgcbear16
    • one year ago
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    |dw:1360688526731:dw|

  7. GaLm
    • one year ago
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    |dw:1360688525132:dw|

  8. Fgcbear16
    • one year ago
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    be careful you must take the positive and negative square root.

  9. ZeHanz
    • one year ago
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    Why not do it this way: x²-81=0 (x+9)(x-9)=0 x+9=0 or x-9=0 x=-9 or x=9

  10. GaLm
    • one year ago
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    ok, cause its longer,

  11. Fgcbear16
    • one year ago
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    There are many ways to do one problem. It all depends on your preference.

  12. ZeHanz
    • one year ago
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    Could have left out some steps... It's not longer, it depends on recognising the difference of two squares. That is why you practised factoring. Now it can help you solve equations. You're free to do it your way!

  13. GaLm
    • one year ago
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    short is better

  14. Fgcbear16
    • one year ago
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    Arguing over this isn't helping. Also it is against the rules to give just answers. @GaLm

  15. GaLm
    • one year ago
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    whatever

  16. GaLm
    • one year ago
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    @laurenn_marie7 , did it help?

  17. Fgcbear16
    • one year ago
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    Did you understand any of this? I can try to explain if you like.

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