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laurenn_marie7

x^2-81=0

  • one year ago
  • one year ago

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  1. GaLm
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    factor or solve for x?

    • one year ago
  2. laurenn_marie7
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    solve

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

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

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

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

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

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

    • one year ago
  9. ZeHanz
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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

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

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

    • one year ago
  12. ZeHanz
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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!

    • one year ago
  13. GaLm
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    short is better

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

    • one year ago
  15. GaLm
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    whatever

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

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

    • one year ago
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