Jawabanmu

2014-09-09T19:45:19+07:00
  (p+q)(p-q) - (p^2+2p+1)
=p^2-q^2-p^2-2p-1
=-q^2 - 2p - 1
1 5 1
2014-09-09T19:47:44+07:00
(p-q)²-(p+1)²
= (p-q)²-2p²
= -2p²(p-q)²
= -2p² - 2pq

mungkin begitu maaf kalo salah
(p-q)²-(p+1)²
(p-q)^2-(p+1)^2=(p^2-q^2)-p^2+1^2