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GaLm
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factor or solve for x?
laurenn_marie7
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solve
ZeHanz
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Then first factor, then solve ;)
Fgcbear16
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|dw:1360688492604:dw|
ZeHanz
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Hey @GaLm, just throwing in solutions isn't very helpful!
Fgcbear16
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|dw:1360688526731:dw|
GaLm
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|dw:1360688525132:dw|
Fgcbear16
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be careful you must take the positive and negative square root.
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
GaLm
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ok, cause its longer,
Fgcbear16
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There are many ways to do one problem. It all depends on your preference.
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!
GaLm
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short is better
Fgcbear16
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Arguing over this isn't helping. Also it is against the rules to give just answers. @GaLm
GaLm
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whatever
GaLm
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@laurenn_marie7 , did it help?
Fgcbear16
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Did you understand any of this? I can try to explain if you like.