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x² - 5x + 6 =0
(x - 2)(x - 3)= 0
x = 2 dan x = 3
L =
= 1/3 x³ - 5/2 x² + 6x |2 sampai 3
= (1/3 3³ - 5/2 3² + 6.3) - (1/3 2³ - 5/2 2² + 6.2)
= (9 - 45/2 + 18) - (8/3 - 10 + 12)
= 27 - 45/2 - 8/3 -2
= 25 - 45/2 - 8/3
= (150-135-16)/6 = -1/6
Karena yang ditanyakan luas, maka nilainya harus positif. Sehingga jawabannya adalah 1/6 (B)