Persamaan kuadrat x2 – 9x + m = 0 memiliki akar- akar α dan β. Jika α = 2β, maka nilai m adalah….

x² – 9x + m = 0

α = 2β → Clue

α + β = -b/a

2β + β = 9

3β = 9

β = 3

α = 2β

α = 6

a . β = m

6 . 3 = m

m = 18