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milenasalikova
@milenasalikova
July 2022
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Упростить выражение и найти значение. Пожалуйста.
(a+1)(a-1)(a²+1)-(9+a²)². При а=1/2
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Bombilo51
=(a
²-1)(a²+1)-(81+18a+a^4)=a^4 -1-81-18a-a^4=-(18a+82)
При a=1/2 -(18/2+82)=-91
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Dimon4ickAliant
'2 '3 - степень
(a'2 - 1)(a'2+1) - (81+18a'2+a'4) = a'4 - 1 - 81 -18a'2 - a'4 = -82 -18a'2
-82 - 18*1/2= -82-9= -91
Проверил, вроде верно)
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Answers & Comments
При a=1/2 -(18/2+82)=-91
(a'2 - 1)(a'2+1) - (81+18a'2+a'4) = a'4 - 1 - 81 -18a'2 - a'4 = -82 -18a'2
-82 - 18*1/2= -82-9= -91
Проверил, вроде верно)