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= 27x^3 -18x^2y + 12xy^2 + 18 x^2y -12 xy^2 + 8y^3
= 27x^3 + 8y^3
jawaban = A
7. ( 3x -8 ) ( 3x -8 )
= 9x^2 -24x -24x + 64
= 9x^2 -48x + 64
jawaban = A
8. ( 6x -15 ) ( 6x -15 )
= 36x^2 -90x -90x + 225
= 36x^2 -180x + 225
nilai a + b + c
36 -180 + 225 = 81
jawaban = D
9. ( 2a + 3b )^3 = 1.2a^3.3b^0 + 3.2a^2.3b^1 + 3.2a^1.3b^2 + 1.2a^0.3b^3
= 8a^3 + 36a^2b + 54ab^2 + 27b^3
jawaban = D
10. 36x^2 -81y^2 = ( 6x + 9y ) ( 6x -9y )
jawaban = A
keterangan = lambang " ^ " => pangkat