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akar-akarnya: α dan β ⇒ α = 2β
nilai m = ?
α + β = 6/2 =3
2β+β = 3
β = 1
2x² - 6x + 2m - 1 = 0
2.1² - 6.1 + 2m -1 = 0
2 -6 -1 +m = 0
m = 5