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alexeydedov2014
@alexeydedov2014
July 2022
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Найди значение выражения
(a-1)(b+1)-(a+1)(b-1) если a-b=1
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KingonImpala67
(а-1)(b+1)-(a+1)(b-1)=
ab+a-b-1-(ab-a+b-1)=
ab+a-b-1-ab+a-b+1; ab взаимно уничтожаются, а т.к. а-b=1, то
1-1+1+1=2
ответ: 2.
1 votes
Thanks 1
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Answers & Comments
ab+a-b-1-(ab-a+b-1)=
ab+a-b-1-ab+a-b+1; ab взаимно уничтожаются, а т.к. а-b=1, то
1-1+1+1=2
ответ: 2.