a^2-ab-6a+6b
при a=6,5
при b=6,3
a^2-ab-6a+6b=a(a-b)-6(a-b)=(a-6)(a-b)
подставляем
(6.5-6)(6.5-6.3)=0.5*0.2=0.1
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a^2-ab-6a+6b=a(a-b)-6(a-b)=(a-6)(a-b)
подставляем
(6.5-6)(6.5-6.3)=0.5*0.2=0.1