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neverforgetvivistee

  • 4 years ago

when do you and when do you not use FOIL for radical equations? look at this video where the guy uses FOIL http://www.youtube.com/watch?v=LY8VBsLf-4M and for equations like √x+8=√3x+8 you would not use FOIL why is this?

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  1. slaaibak
    • 4 years ago
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    FOIL is used when two brackets should be multiplied with each other. This is not the case here. You would only need subtraction and division.

  2. neverforgetvivistee
    • 4 years ago
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    you only need subtraction and division for what? are you saying that the guy shouldn't have used foil ?

  3. Elekt
    • 4 years ago
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    No, he is saying that you only need that for your expression.

  4. neverforgetvivistee
    • 4 years ago
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    thanks i get it i guess i'm just really sleepy right now no duh

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