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Nikirson4ik
@Nikirson4ik
July 2022
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Упростите выражение (2a - 3b)^3 + 12ab(3a-5b)
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zhenyaM2002
Verified answer
(2a-3b)^3 + 12ab(3a-5b) =
= (2a)^3 - 3*(2a)^2 *3b + 3*2a* (3b)^2 -(3b)^3 +12ab*3a+12ab*(-5b)=
= 8a^3 - 36a^2b +54ab^2 - 27b^3 +36a^2 b - 60ab^2=
= 8a^3 - 6ab^2 -27b^3
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Answers & Comments
Verified answer
(2a-3b)^3 + 12ab(3a-5b) == (2a)^3 - 3*(2a)^2 *3b + 3*2a* (3b)^2 -(3b)^3 +12ab*3a+12ab*(-5b)=
= 8a^3 - 36a^2b +54ab^2 - 27b^3 +36a^2 b - 60ab^2=
= 8a^3 - 6ab^2 -27b^3