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DF001

  • one year ago

How can I solve this problem in LCD method?

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  1. DF001
    • one year ago
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    |dw:1441761645186:dw|

  2. DF001
    • one year ago
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    I know the first step is to flip the second fraction but I am lost after that

  3. DF001
    • one year ago
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    |dw:1441761884045:dw|

  4. anonymous
    • one year ago
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    It looks like they want a different method. one denominator is 9 the other is 3x, so the LCD will be 9x.

  5. anonymous
    • one year ago
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    multiply by 9x/9x

  6. anonymous
    • one year ago
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    |dw:1441761936372:dw|

  7. DF001
    • one year ago
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    How do you figure that the lcd is 9x

  8. anonymous
    • one year ago
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    then cancel|dw:1441761977491:dw|

  9. DF001
    • one year ago
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    can you also show me the alternative method that they may want me to use?

  10. anonymous
    • one year ago
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    lcd is 9x because you need one part of each thing in the denominators. so you need 3x and 9. Since 3 is a factor of both, it's 9x

  11. anonymous
    • one year ago
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    This is the alternative method where you multiply by 9x/9x on top and bottom.

  12. anonymous
    • one year ago
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    the other one is where you flip. did you want to go through this both ways?

  13. DF001
    • one year ago
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    im sorry i stepped out for a second I want to use the alternative way, please show me

  14. anonymous
    • one year ago
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    the lcd is 9x, so you have to multiply both fractions by it and then the denominators will cancel |dw:1441762561073:dw|

  15. anonymous
    • one year ago
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    understand?

  16. DF001
    • one year ago
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    I think I do now but a little kinks i need to figure out myself :)

  17. DF001
    • one year ago
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    ill work on the question with your steps for a bit, ill try to get back to this after im done

  18. DF001
    • one year ago
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    wait but, if i flip the other fraction when multiplying, doesnt the lcd change?

  19. anonymous
    • one year ago
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    ok. the only thing left is to factor the new denominator (3x - 18) to 3(x - 6) then you can cancel more|dw:1441762727663:dw|

  20. DF001
    • one year ago
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    |dw:1441762755407:dw|

  21. anonymous
    • one year ago
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    if you're multiplying you don't use the lcd, you factor and cancel

  22. DF001
    • one year ago
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    oh, do i factor 3x-18

  23. anonymous
    • one year ago
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    |dw:1441762803117:dw|

  24. anonymous
    • one year ago
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    yes, same solution with both methods

  25. DF001
    • one year ago
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    ah i see now

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