Write the rational expressions as equivalent rational expressions with the lowest common denominator.
LCD
(x − 5)(x + 3)(x + 4)
x2 − 2x − 15
=
3 / [ x2 - 2x - 15 ] = 3 / [ (x - 5)(x + 3) ] = 3(x + 4) / [ (x - 5)(x + 3)(x + 4) ] or (3x + 12) / [ (x - 5)(x + 3)(x + 4) ]
8x / [ x2 - x - 20 ] = 8x / [ (x - 5)(x + 4) ] = 8x(x + 3) / [ (x - 5)(x + 4)(x + 3) ] or (8x2 + 24x) / [ (x - 5)(x + 3)(x + 4) ]
+208 
