# Math Help - simplifying

1. ## simplifying

hi, can someone please explain to me how they got from

$[\frac{s + n(\mu - \overline{Y})^2}{2}]^{-n/2}$
to
$[(1 + \frac{n(\mu - \overline{Y})^2}{s})(\frac{s}{2})]^{-n/2}$

coz i don't get it sorry

2. Originally Posted by omgimsodumb
hi, can someone please explain to me how they got from

$[\frac{s + n(\mu - \overline{Y})^2}{2}]^{-n/2}$
to
$[(1 + \frac{n(\mu - \overline{Y})^2}{s})(\frac{s}{2})]^{-n/2}$

coz i don't get it sorry
Most of that is "clutter". Think of it as $\frac{s+ A}{2}$. Factor out a "1/2": $(s+ A)(\frac{1}{2})= (s+ \frac{As}{s})\frac{1}{2}$ and now factor out an "s": $(1+ \frac{A}{s})\frac{s}{2}$.