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y³+py+q=0
(y-5)³+5(y-5)²-9(y-5)-49=0
y³+25y-50y-9y+45-49=0
y³-34y-4=0
p=-9-25=-34
q=250-49+45=246
Teraz wystarczy podstawić pod ten wzór:
y³+py+q=0