carilah hasil (3a+3b) ³

(3a+3b)(3a+3b)(3a+3b)
=(9a^2+18ab+9b^2)(3a+3b)
=27a^3+27a^2b+54a^2b+54ab^2+27ab^2+27b^3
=27a^3+81a^2b+81ab^2+27b^3