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a= 3, b= -12, dan c=2
α+ β = -b/a
= -(-12)/3
= 12/3
= 4
αβ = c/a
= 2/3
jumlah dan hasil kali akar-akar α+2 dan β +2 adalah
· (α +2) + (β + 2) = (α + β) +4 = 4 + 4 = 8
· (α + 2) (β + 2) = αβ + 2(α +β) + 4 = 2/3 + 2 x 4 + 4 = 2/3 + 12 = 12 2/3
jadi, diperoleh persamaan kuadrat baru
- [(α + 2) + (β + 2)] +(α+2) (β+2) =0
- 8 +12 2/3 = 0
semoga membantu....