Question 300818
(-3)/(2p^2+7p-15), p/(2p^2-11p+12), 2/(p^2+p-20) 
-----------------
(2p^2+7p-15) = (2p - 3)*(p + 5)
(2p^2-11p+12) = (2p - 3)*(p - 4)
(p^2+p-20) = (p + 5)*(p - 4)
-----------------------------
LCD = (2p-3)*(p+5)*(p-4)
Same as your answer.