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p=1
q=2
P(2;1)
1=a(2-1)+2
1=a+2
a=1-2
a=-1
-b:2a=1
-b:2×-1=1
-b:-2=1
b=2×1=2
q=-Δ:4a
2=-(b²-4ac):4×-1
b²-4ac=8
2²-4×(-1)c=8
4+4c=8
4c=8-4
4c=4
c=4:4
c=1
współczynniki:
a=-1
b=2
c=1