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spimentel

  • 3 years ago

a^4-4096

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  1. Rezz5
    • 3 years ago
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    {{a -> -8}, {a -> -8 i}, {a -> 8 i}, {a -> 8}}

  2. spimentel
    • 3 years ago
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    thats not th problem. its a to the 4th power -4096 it asks to factor it out

  3. asnaseer
    • 3 years ago
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    do you know this factorisation?\[a^2-b^2=(a+b)(a-b)\]

  4. spimentel
    • 3 years ago
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    yes

  5. asnaseer
    • 3 years ago
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    good - so first express your expression as a difference of two squares. then factorise it using this method.

  6. asnaseer
    • 3 years ago
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    do you understand?

  7. spimentel
    • 3 years ago
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    kool thnks

  8. asnaseer
    • 3 years ago
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    yw :) remember you can apply this multiple times. so the first factorisation might lead to another sub-expression which has a difference of two squares.

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