Hasil int2gral…………..

4/3x^3 – 12x^2 + 9x

= ( 4/3(2)^3 – 12(2)^2 + 9(2) ) – ( 4/3(-1)^3 – 12(-1)^2 + 9(-1) )
= (32/3 – 48 + 18) – (-4/3 -12 – 9)
= (32/3 – 30) – (-4/3 – 21)
= 36/3  -  9
= 12 – 9 = 3 (B)