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b=x+1
P=ab
x(x+1)=16,75
x²+x-16,75 =0
Δ=b²-4ac
Δ=1+67=68=4*17
√Δ=2√17
x1=(-b+√Δ)/(2a)
x1=(-1+2√17)/2
a=(-1+2√17)/2 m
b=(-1+2√17)/2 +1
b=(1+2√17)/2 m
x2=(-b-√Δ)/(2a) <0 nie dotyczy