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Verified answer
Bab Persamaan KuadratMatematika SMP Kelas VIII
3x² - 2x - 8 = 0
(3x + 4) (x - 2) = 0
3x + 4 = 0
3x = -4
x = -4/3
atau
x - 2 = 0
x = 2
jadi, akar-akarnya -4/3 dan 2
Verified answer
Persamaan Kuadrat.3x² - 2x - 8 = 0
x₁₂ = [-b ± √(b² - 4ac)] / (2a)
= {-(-2) ± √[(-2)² - 4(3)(-8)]} / [2(3)]
x₁ = (2 + 10) / 6 = 2
x₂ = (2 - 10) / 6 = -4/3
Akar-akarnya x₁ = 2 atau x₂ = -4/3.