Jawaban:
D
Penjelasan dengan langkah-langkah:
a³ + 3ab² > 3a²b + b³
pindahkan semua bentuk aljabar ke ruas kiri
a³ – 3a²b + 3ab² – b³ > 0
a³ – a²b – 2a²b + ab² + 2ab² – b³ > 0
a²(a – b) – 2ab(a – b) + b²(a – b) > 0
(a – b)(a² – 2ab + b²) > 0
(a – b)(a² – ab – ab + b²) > 0
(a – b)(a(a – b) – b(a –b)) > 0
(a – b)(a – b)(a – b) > 0
(a – b)³ > 0
a – b > ³√0
a – b > 0
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Jawaban:
D
Penjelasan dengan langkah-langkah:
a³ + 3ab² > 3a²b + b³
pindahkan semua bentuk aljabar ke ruas kiri
a³ – 3a²b + 3ab² – b³ > 0
a³ – a²b – 2a²b + ab² + 2ab² – b³ > 0
a²(a – b) – 2ab(a – b) + b²(a – b) > 0
(a – b)(a² – 2ab + b²) > 0
(a – b)(a² – ab – ab + b²) > 0
(a – b)(a(a – b) – b(a –b)) > 0
(a – b)(a – b)(a – b) > 0
(a – b)³ > 0
a – b > ³√0
a – b > 0
a > b