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Ob=2a+2b
300=2a+2b
150=a+b
a=150-b
P=ab
P=(150-b)b
P(b)=-b²+150b
Pmax=q dla b=p
q=-Δ/4a p=-b/2a
Δ=150²-4*(-1)*0=22500m² p=-150/2*(-1)=-150/(-2)=75
Pmax=-22500/4*(-1)=5626m²=56,26a
dla b=75m i a=150-75=75m