Persamaan kuadrat baru adalah... Soalnya ada di foto

3x²-2x+4 = 0
α+β = -b/a = 2/3
α*β = c/a = 4/3

3α+1 + 3β+1 = 3(α+β) + 2
= 3(2/3) + 2
= 4
(3α+1)(3β+1) = 9αβ + 3α + 3β + 1
= 9αβ + 3(α+β) + 1
= 9(4/3) + 3(2/3) + 1
= 12 + 2 + 1
= 15

persamaan baru
= x² - 4x + 15

jawaban = C
semoga membantu :)