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unimatix

  • one year ago

why are these two equations equal

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  1. unimatix
    • one year ago
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    \[\frac{ u ^{2}}{ 1+u^2 } = 1 - \frac{ 1 }{ 1+u^2 }\]

  2. unimatix
    • one year ago
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    basic algebra i'm sure. just drawing a blank here.

  3. dan815
    • one year ago
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    you have to take the common denominator

  4. dan815
    • one year ago
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    just like how you need common denominator to add fractions now your denominator just happens to be some expression instead of a number

  5. dan815
    • one year ago
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    |dw:1442717373661:dw|

  6. dan815
    • one year ago
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    |dw:1442717414388:dw|

  7. unimatix
    • one year ago
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    okay I see it now.

  8. unimatix
    • one year ago
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    thanks!

  9. dan815
    • one year ago
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    welcome

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