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x₁ + x₂ = 6
x₂² + x₂ = 6
x₂² + x₂ - 6 = 0
(x₂ + 3)(x₂ - 2) =0
x₂= -3 atau 2
x₁.x₂ = m+3
x₂².x₂ = m + 3
x₂³ = m + 3
m = x₂³ - 3
saat x₂ = -3
m = (-3)³ - 3
= -30
saat x₂ = 2
m = (2)³ - 3
= 5