Question 131150
( x/(x^2 – 9) ) – ( x/(x^2 + 2x – 15) )
=(x/((x+3)(x-3)))-(x/((x+5)(x-3)))
=(x(x+5))-(x(x+3))/((x+3)(x-3)(x+5))
=(x^2+5x)-(x^2+3x)/((x+3)(x-3)(x+5))
=2x/((x+3)(x-3)(x+5))
.
Ed