anonymous
  • anonymous
x^2-81=0
Mathematics
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anonymous
  • anonymous
x^2-81=0
Mathematics
jamiebookeater
  • jamiebookeater
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
factor or solve for x?
anonymous
  • anonymous
solve
ZeHanz
  • ZeHanz
Then first factor, then solve ;)

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anonymous
  • anonymous
|dw:1360688492604:dw|
ZeHanz
  • ZeHanz
Hey @GaLm, just throwing in solutions isn't very helpful!
anonymous
  • anonymous
|dw:1360688526731:dw|
anonymous
  • anonymous
|dw:1360688525132:dw|
anonymous
  • anonymous
be careful you must take the positive and negative square root.
ZeHanz
  • ZeHanz
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
anonymous
  • anonymous
ok, cause its longer,
anonymous
  • anonymous
There are many ways to do one problem. It all depends on your preference.
ZeHanz
  • ZeHanz
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!
anonymous
  • anonymous
short is better
anonymous
  • anonymous
Arguing over this isn't helping. Also it is against the rules to give just answers. @GaLm
anonymous
  • anonymous
whatever
anonymous
  • anonymous
@laurenn_marie7 , did it help?
anonymous
  • anonymous
Did you understand any of this? I can try to explain if you like.

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