Jawapan

2016-02-11T22:51:46+08:00
P² + 2p + 1 - (p² - 1)

= p² + 2p + 1 - p² + 1
= 2p + 2
-2 = 2p
-1 = p
2016-02-11T22:54:05+08:00
(p+1)²-(p²-1)
p²+2p+1-p²+1
2p+2
2p=-2
p=-1