Penjelasan dengan langkah-langkah:
PERSAMAAN KUBIK
x³ – 8 = 0
x³ – 2³ = 0
(x – 2)(x² + 2x + 4) = 0
x₁ = 2
x² + 2x + 4 = 0
(x + 1)² = –3
x + 1 = ± i√3
x = –1 ± i√3
x₂ = –(1 – i√3)
x₃ = –(1 + i√3)
Jadi Nilai x₁, x₂, dan x₃ adalah 2, –(1 – i√3), –(1 + i√3)
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Penjelasan dengan langkah-langkah:
PERSAMAAN KUBIK
x³ – 8 = 0
x³ – 2³ = 0
(x – 2)(x² + 2x + 4) = 0
x₁ = 2
x² + 2x + 4 = 0
(x + 1)² = –3
x + 1 = ± i√3
x = –1 ± i√3
x₂ = –(1 – i√3)
x₃ = –(1 + i√3)
Jadi Nilai x₁, x₂, dan x₃ adalah 2, –(1 – i√3), –(1 + i√3)