Matematika kelas 12 , mohon bantuannya yg b saja

jawab

₀⁴∫(x -1)(x+2) dx

= ₀⁴∫ (x² + x - 2 ) dx

= [ 1/3 x³ + 1/2 x² - 2x ]⁴₀

= 1/3(64-0)  + 1/2 (16 - 0) - 2(4 - 0)
= 64/3 + 8 - 8
= 64/3 
= 21 ¹/₃ satuan