Question 171522
{{{ (x^2-2x-15)/(25-x^2) }}}
Factoring
{{{ (x-5)(x+3)/(5+x)(5-x) }}}
{{{ -(5-x)(x+3)/(5+x)(5-x) }}}
Now, canceling like-terms:
{{{ -(x+3)/(5+x) }}}
.
Or, you could write it as:
{{{ (-3-x)/(5+x) }}}