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mrvoroshi
@mrvoroshi
July 2022
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упростите выражение (2a-1)(4a^2+2a+1) и найдите его значение при a=-1/2
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gorshckowashur1
Verified answer
Ответ:
(2a-1)(4a^2+2a+1)=
=8a^3+4a^2+2a-4a^2-2a-1=
=8a^3-1
Если а=-1/2
8*(-1/2)^3-1=
=8*(-1/8)-1=-1-1=-2
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Answers & Comments
Verified answer
Ответ:(2a-1)(4a^2+2a+1)=
=8a^3+4a^2+2a-4a^2-2a-1=
=8a^3-1
Если а=-1/2
8*(-1/2)^3-1=
=8*(-1/8)-1=-1-1=-2