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catgirl17

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

  • one year ago
  • one year ago

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

    • one year ago
  2. catgirl17
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    how do i solve this problem?

    • one year ago
  3. pfenn1
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    I have to go eat dinner but maybe @dpaInc can help you.

    • one year ago
  4. dpaInc
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    mmm. what are we having!!! pizza?

    • one year ago
  5. dpaInc
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    ok.. hello?

    • one year ago
  6. catgirl17
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    i'm here

    • one year ago
  7. pfenn1
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    What is the LCD?

    • one year ago
  8. catgirl17
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    i don't know

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

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

    • one year ago
  11. mellylol
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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?

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

    • one year ago
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