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Thread: Reducing Rational Expressions?

  1. #1

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    Reducing Rational Expressions?

    Anyone have any idea how i can go about reducing this expression? 5x-7x/ x2-7x2

    I end up factoring as x(5-7)/x(x-7x) which i see no other way to factor. Now i don't know where to go from here.

  2. #2
    Only Slightly Obsessive jemidiah's Avatar
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    (5x-7x)/(x2-7x2) = x(5-7)/x2(1-7) = -2/-6x = 1/3x, x <> 0
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  3. #3
    So Unbanned DiGiTaIErRoR's Avatar
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    Without brackets(literal)... -(7x^3-5x^2+7)/x

    Otherwise 1/3x

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    Ahhhh ok. Thanks for the help guys. Math is not one of my strong subjects. How about this one. I think i got it but im not too sure.

    y3 - y2 - 2y/ 6y2 - 24

    y(y2 -y -2)/6(y2 - 4)

    y(y-2)(y+1)/6(y-2)(y+2) --> y(y+1)/6(y+2)

  5. #5
    So Unbanned DiGiTaIErRoR's Avatar
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    Originally posted by Dilenger4
    Ahhhh ok. Thanks for the help guys. Math is not one of my strong subjects. How about this one. I think i got it but im not too sure.

    y3 - y2 - 2y/ 6y2 - 24

    y(y2 -y -2)/6(y2 - 4)

    y(y-2)(y+1)/6(y-2)(y+2) --> y(y+1)/6(y+2)
    That's right.

  6. #6

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    Many thanks. May your liver have a long and healthy life.

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