6+nP2 : 6-nP2 = 56:12
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P(6+n,2) : P(6-n,2) = 56:12 = 14:3
[(6+n)(6+n-1)]:[(6-n)(6-n-1)] = 14:3
[(6+n)(5+n)]:[(6-n)(5-n)] = 14:3
(30+11n+n²):(30-11n+n²)=14:3
90+33n+3n² = 420-154n+14n²
11n²-187n+330 = 0
n²-17n+30 = 0
(n-15)(n-2) = 0
n = 2,15
[(6+n)(6+n-1)]:[(6-n)(6-n-1)] = 14:3
[(6+n)(5+n)]:[(6-n)(5-n)] = 14:3
(30+11n+n²):(30-11n+n²)=14:3
90+33n+3n² = 420-154n+14n²
11n²-187n+330 = 0
n²-17n+30 = 0
(n-15)(n-2) = 0
n = 2,15
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