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catgirl17 Group Title

perform the operations and simplify: 3x+4/x^2-16 - 2/x-4

  • 2 years ago
  • 2 years ago

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  1. pfenn1 Group Title
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    Is this your expression?\[\frac{3x+4}{x^2-2} - \frac{2}{x-4}\]

    • 2 years ago
  2. catgirl17 Group Title
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    how do i solve this problem?

    • 2 years ago
  3. pfenn1 Group Title
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    I have to go eat dinner but maybe @dpaInc can help you.

    • 2 years ago
  4. dpaInc Group Title
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    mmm. what are we having!!! pizza?

    • 2 years ago
  5. dpaInc Group Title
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    ok.. hello?

    • 2 years ago
  6. catgirl17 Group Title
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    i'm here

    • 2 years ago
  7. pfenn1 Group Title
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    What is the LCD?

    • 2 years ago
  8. catgirl17 Group Title
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    i don't know

    • 2 years ago
  9. pfenn1 Group Title
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    well, let's try a LCD of\[(x^2-2)(x-4)\]What we get is\[\frac{3x+4}{x^2-2} - \frac{2}{x-4}=\frac{(3x+4)(x-4)-2(x^2-2)}{(x^2-2)(x-4)}\]

    • 2 years ago
  10. pfenn1 Group Title
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    Can you multiply out the numerator?\[(3x+4)(x-4)-2(x^2-2)=\text { ?}\]

    • 2 years ago
  11. mellylol Group Title
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    if there was an equal sign rather than the subtraction sign between the two only then you can do that. That is why this question is puzzling. you are cross multiplying...is that a legal move?

    • 2 years ago
  12. pfenn1 Group Title
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    @mellylol, am I cross multiplying? I thought I was coming up with a LCD. What should I have done?

    • 2 years ago
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