f(x)=2x²+4x+6 |:2
f(x)=x²+2x+3
Δ=2²-4·1·3
Δ=4-12
Δ=-8
p=-b/2a=-2/(2·1)=-2/2=-1
q=-Δ/4a=8/(4·1)=8/4=2
f(x)=a(x-p)²+q
f(x)=(x+1)²+2
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f(x)=2x²+4x+6 |:2
f(x)=x²+2x+3
Δ=2²-4·1·3
Δ=4-12
Δ=-8
p=-b/2a=-2/(2·1)=-2/2=-1
q=-Δ/4a=8/(4·1)=8/4=2
f(x)=a(x-p)²+q
f(x)=(x+1)²+2