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anonymous

  • one year ago

simplify 12x3/12x7

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  1. welshfella
    • one year ago
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    first what is 12/ 12 ?

  2. anonymous
    • one year ago
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    1

  3. welshfella
    • one year ago
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    right now lets deal with the terms in x these are x^3 and x^7 do you know the law of indices when dividing?

  4. anonymous
    • one year ago
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    no sir.

  5. welshfella
    • one year ago
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    x^4 / x^2 = x^(4-2) = x^2

  6. anonymous
    • one year ago
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    my guess (but with good reason) is 1 / 12x4

  7. welshfella
    • one year ago
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    you subtract the indices (exponents is another word for them)

  8. anonymous
    • one year ago
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    Ah.

  9. welshfella
    • one year ago
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    well your x^4 is correct because x^7 / x^3 = x^(7-3) = x^4

  10. anonymous
    • one year ago
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    ok

  11. anonymous
    • one year ago
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    thanks

  12. welshfella
    • one year ago
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    but we dealt with the numbers earlier on 12/12 = 1 the 12's disappear

  13. anonymous
    • one year ago
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    right

  14. welshfella
    • one year ago
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    so the final answer is 1 / x^4

  15. welshfella
    • one year ago
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    do you understand ?

  16. anonymous
    • one year ago
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    thanks bro. it was a multiple choice with the choces being 12x4, 1/12x4, 1/12x-4

  17. welshfella
    • one year ago
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    well its none of those

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