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РазобЛаЧеннЫй
@РазобЛаЧеннЫй
July 2022
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Срочно!!!!!!!!!!!!!Решить
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m11m
8х⁶+7х³-1=0
Пусть х³=у
8у²+7у-1=0
Д=7²-4*8*(-1)=49+32=81=9²
у₁=(-7-9)/16=-16/16=-1
у₂=2/16=1/8
х³=-1 х³=1/8
х³=(-1)³ х=∛(1/8)
х=-1 х=1/2=0,5
Ответ: -1; 0,5
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Answers & Comments
Пусть х³=у
8у²+7у-1=0
Д=7²-4*8*(-1)=49+32=81=9²
у₁=(-7-9)/16=-16/16=-1
у₂=2/16=1/8
х³=-1 х³=1/8
х³=(-1)³ х=∛(1/8)
х=-1 х=1/2=0,5
Ответ: -1; 0,5