Answer:
Step-by-step explanation:
a² - b² = (a + b)(a - b)
a= p ; b = 2p + 1
p² - (2p + 1)² = (p + 2p +1) (p - [2p+1] )
= (3p + 1) (p - 2p -1)
= (3p + 1)(-p - 1)
-(p + 1)(3p + 1)
p² – (2p+1)²
(p - 2p - 1)(p + 2p + 1)
(-p - 1)(3p + 1)
