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sue101

  • one year ago

Simplify the sum. 7/(a+8) + 7/(a^2 - 64)

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  1. ceb105
    • one year ago
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    Okay so notice that the bottom of the second fraction is infact the "difference of two squares" i.e. (a^2-64)=(x-8)(x+8), then multiply the first fraction by x-8 so that you have equal denominators then you may add them together simply and simplify if nessecary

  2. ajprincess
    • one year ago
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    What is the lcm of a+8 and a^2-64?

  3. sue101
    • one year ago
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    64?

  4. lacypennelll
    • one year ago
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    You play AnimalJam?

  5. ajprincess
    • one year ago
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    a+8=1*(a+8) a^2-64=(a+8)(a-8)

  6. lacypennelll
    • one year ago
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    .-. Thats wha aj stands for

  7. sue101
    • one year ago
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    aj??

  8. lacypennelll
    • one year ago
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    ^ nvm

  9. sue101
    • one year ago
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    aj u there?

  10. ajprincess
    • one year ago
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    yup I am

  11. sue101
    • one year ago
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    oh ok so that answer i will is C or D

  12. sue101
    • one year ago
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    ??

  13. lacypennelll
    • one year ago
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    :| Silence

  14. ajprincess
    • one year ago
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    Lcm of a+8 and a^2-64 is a^2-64 a^2-64=(a-8)(a+8) So the common denominator is a^2-64 With vat expression do u need to multiply (a+8) to make it a^2-64?

  15. ajprincess
    • one year ago
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    |dw:1359656931020:dw||dw:1359657016517:dw|

  16. sue101
    • one year ago
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    I don't have that as a mutilple choice?

  17. ajprincess
    • one year ago
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    simplify the numerator

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