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=3(2x-1)(2x-1)^2
=3(2x-1)(4x^2-4x+1)
=3(8x^3-12x^2+6x-1)
= 24x^3-36x^2+18x-3
(a-b)³ = 1a³ - 3a²b + 3ab² - 1b³
(6x-3)³= 1.(6x)³ - 3.(6x)².(-3) + 3.(6x).(-3)² - 1.(-3)³
= 216x³ - 3.36x².(-3) + 3.6x.9 - (-27)
= 216x³ + 324x² + 162x + 27
bismillah bener;) jangan lupa bintang + trimakasihnya:)