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санюра2
@санюра2
August 2022
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27a³+8b³-(3a+2b)(9a²+6ab+4b²) при а=–1 b=1.
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mishka242
(3a)^3+(2b)^3-(3a+2b)(9a^2+6ab+4b^2)=(3a+2b)(9a^2-6ab+4b^2) - (3a+2b)Х
(9a^2+6ab+4b^2)=(3a+2b)(9a^2-6ab+4b^2-9a^2-6ab-4b^2)=(
3a+2b)x(-12ab)=(3x(-1)+2x1)x(-1)x1x(-12)=-12
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санюра2
что означает символ ^
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Answers & Comments
(9a^2+6ab+4b^2)=(3a+2b)(9a^2-6ab+4b^2-9a^2-6ab-4b^2)=(3a+2b)x(-12ab)=(3x(-1)+2x1)x(-1)x1x(-12)=-12