2p/3 = (2√k - 1) /

2(p^2)/3 = 2√k - 1

2(p^2)/3 + 1 = 2√k

( 2(p^2)/3 + 1 )/2 = √k

[ ( 2(p^2)/3 + 1 )/2 ]^2 = k

2p/3 = (2sqrt(k) - 1)/p

2p^2/3 = 2sqt(k) - 1

2p^2/3 - 3/3 = 2sqrt(k)

(2p^2 - 3)/3 = 2sqrt(k)

(2p^2 - 3)/6 = sqrt(k)

((2p^2 - 3)/6)^2 = k

(4p^4 - 12p^2 + 9)/36 = k

1/9p^4 - 1/3p^2 + 1/4 = k