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f(x) = -2x-2(x+5)
f(x)= -2x² -10x-2x-10
f(x)= -2x²-12x-10
Δ= 144-80=64
p=-b/2a q=-Δ/4a
p=-3 q=-8
postac kanoniczna F(x)=a(x-p)² +q
f(x)= -2(x+3)²-8