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alevtina20023
@alevtina20023
July 2022
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известно что 2 (a+1)(b+1)=(a+b)(a+b+2) НВЙДИТЕ a^2+b^2
ЭТО НА СУББОТУ ПОМОГИТЕ
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m11m
2(a+1)(b+1)= (a+b)(a+b+2)
2(ab+b+a+1)=a²+ab+ab+b²+2a+2b
2ab+2b+2a+2 = a²+2ab+b²+2a+2b
2ab-2ab+2b-2b+2a-2a+2=a²+b²
2=a²+b²
a²+b²=2
Ответ: 2
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Answers & Comments
2(ab+b+a+1)=a²+ab+ab+b²+2a+2b
2ab+2b+2a+2 = a²+2ab+b²+2a+2b
2ab-2ab+2b-2b+2a-2a+2=a²+b²
2=a²+b²
a²+b²=2
Ответ: 2