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masukkan nilai p kemudian nilai 1, didapat:
(1/2 p²+p) - (1/2 +1) = p
1/2 p²+p - 3/2 =p dikali 2
p² +2p -3 =2p
p² + 2p -2p -3 =0........faktorkaN
p² -3 =0
p = +√3
jadi p =√3