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pottersheep

  • 3 years ago

Is (+-i√15)/5 equal to +-i√(3/5) ???? Shouldnt i be over 5???

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  1. TuringTest
    • 3 years ago
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    \[\frac{\sqrt{15}}5=\frac{\sqrt{3\cdot5}}5=\sqrt{\frac35}\]

  2. pottersheep
    • 3 years ago
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    Thanks, shouldn'tthe i still be over 5 tho?

  3. TuringTest
    • 3 years ago
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    nope...

  4. TuringTest
    • 3 years ago
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    \[\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]

  5. pottersheep
    • 3 years ago
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    oo but the i was over 5 to begin with

  6. TuringTest
    • 3 years ago
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    but the 5 can move around...

  7. pottersheep
    • 3 years ago
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    ok let me try to process this xD

  8. TuringTest
    • 3 years ago
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    \[\pm\frac i5\sqrt{15}=\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]

  9. TuringTest
    • 3 years ago
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    remember that\[\frac{2i}3=i\frac23\]not\[\frac{2i}3=\frac i3\frac23\]

  10. TuringTest
    • 3 years ago
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    \[a\frac bc=b\frac ac=\frac{ab}c\]

  11. pottersheep
    • 3 years ago
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    :O it is???

  12. pottersheep
    • 3 years ago
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    ooo

  13. TuringTest
    • 3 years ago
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    what else could it be?

  14. pottersheep
    • 3 years ago
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    THANKSSS

  15. TuringTest
    • 3 years ago
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    \[\frac{ab}c=a\cdot\frac bc\neq\frac ac\cdot\frac bc\]

  16. TuringTest
    • 3 years ago
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    welcome :D

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