pottersheep
  • pottersheep
Is (+-i√15)/5 equal to +-i√(3/5) ???? Shouldnt i be over 5???
Mathematics
chestercat
  • chestercat
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TuringTest
  • TuringTest
\[\frac{\sqrt{15}}5=\frac{\sqrt{3\cdot5}}5=\sqrt{\frac35}\]
pottersheep
  • pottersheep
Thanks, shouldn'tthe i still be over 5 tho?
TuringTest
  • TuringTest
nope...

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TuringTest
  • TuringTest
\[\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]
pottersheep
  • pottersheep
oo but the i was over 5 to begin with
TuringTest
  • TuringTest
but the 5 can move around...
pottersheep
  • pottersheep
ok let me try to process this xD
TuringTest
  • TuringTest
\[\pm\frac i5\sqrt{15}=\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]
TuringTest
  • TuringTest
remember that\[\frac{2i}3=i\frac23\]not\[\frac{2i}3=\frac i3\frac23\]
TuringTest
  • TuringTest
\[a\frac bc=b\frac ac=\frac{ab}c\]
pottersheep
  • pottersheep
:O it is???
pottersheep
  • pottersheep
ooo
TuringTest
  • TuringTest
what else could it be?
pottersheep
  • pottersheep
THANKSSS
TuringTest
  • TuringTest
\[\frac{ab}c=a\cdot\frac bc\neq\frac ac\cdot\frac bc\]
TuringTest
  • TuringTest
welcome :D

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