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(9a^2-12ab+4b^2) (3a-2b) =
27a^3-18a^2b-36a^2b+24ab^2+12ab^2-8b^3
27a^3-54a^2b+36ab^2-8b^3 ->> ini jwbnnya
(9a²-6ab-6ab+4b²)(3a-2b)
(9a²-12ab+4b²)(3a-2b)
27a³-18a²b-36a²b+24ab²+12ab²-8b³
27a³-54a²b+36ab²-8b²
maaf kalo salah