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Nayka13nayka
@Nayka13nayka
August 2022
1
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Решите выражение:
9х^2-9
--------------------
ах^2-а+в-вх^2
Если:
а^3-3а^2в+3ав^2-в3=27 пожалуйста срочно надо
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sedinalana
а^3-3а^2в+3ав^2-в3=27
(a-b)
³=27
a-b=3
---------------------------
(9x²-9)/(ax²-a+b-bx²)=9(x²-1)/[a(x²-1)-b(x²-1)]=9(x²-1)/(x²-1)(a-b)=9/(a-b)=
=9/36=3
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Nayka13nayka
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Answers & Comments
(a-b)³=27
a-b=3
---------------------------
(9x²-9)/(ax²-a+b-bx²)=9(x²-1)/[a(x²-1)-b(x²-1)]=9(x²-1)/(x²-1)(a-b)=9/(a-b)=
=9/36=3