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Zzzulya
@Zzzulya
August 2021
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Упростить выражение: (a-a/1-a)*2*(1-a)/(a+b) в квадрате -b*(2a+b)
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Verified answer
(a-a/(1-a))*2*(1-a)/((a+b)^2 -b*(2a+b)) =
((a-a^2-a)/(1-a))*2*(1-a)/((a+b)^2 -b*(2a+b))=
=-a^2*2*/(a^2+2ab+b^2 -b*2a-b^2) =
=-a^2*2*/(a^2)=-2
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Verified answer
(a-a/(1-a))*2*(1-a)/((a+b)^2 -b*(2a+b)) =((a-a^2-a)/(1-a))*2*(1-a)/((a+b)^2 -b*(2a+b))=
=-a^2*2*/(a^2+2ab+b^2 -b*2a-b^2) =
=-a^2*2*/(a^2)=-2