Question

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

Answer 1

\[\frac{\sqrt{15}}5=\frac{\sqrt{3\cdot5}}5=\sqrt{\frac35}\]

Answer 2

Thanks, shouldn'tthe i still be over 5 tho?

Answer 3

nope...

Answer 4

\[\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]

Answer 5

oo but the i was over 5 to begin with

Answer 6

but the 5 can move around...

Answer 7

ok let me try to process this xD

Answer 8

\[\pm\frac i5\sqrt{15}=\pm i\frac{\sqrt{15}}5=\pm i\frac{\sqrt{3\cdot5}}5=\pm i\sqrt{\frac{3\cdot5}{25}}=\pm i\sqrt{\frac35}\]

Answer 9

remember that\[\frac{2i}3=i\frac23\]not\[\frac{2i}3=\frac i3\frac23\]

Answer 10

\[a\frac bc=b\frac ac=\frac{ab}c\]

Answer 11

:O it is???

Answer 12

ooo

Answer 13

what else could it be?

Answer 14

THANKSSS

Answer 15

\[\frac{ab}c=a\cdot\frac bc\neq\frac ac\cdot\frac bc\]

Answer 16

welcome :D