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Old 2019-07-01, 22:32   #6
Dr Sardonicus
 
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Feb 2017
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Using the computational might of Pari-GP,

? f=x^2-2;z=Mod((6+23*x)/(2+x),f)
%1 = Mod(20*x - 17, x^2 - 2)

? charpoly(%)
%2 = x^2 + 34*x - 511

Last fiddled with by Dr Sardonicus on 2019-07-01 at 22:33 Reason: rewording
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