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x = -2, x = -1
Maka, integralnya adalah:
= int[-2,-1] 2-x² - x dx
= int[-2,-1] -x² - x + 2 dx
= -1/3 x³ - 1/2 x² + 2x dari [-2,-1]
Maka,
= -1/3 ([-1]³-[-2]³) - 1/2 ([-1]²-[-2]²) + 2(-1-(-2))
= -1/3 (-1+8) - 1/2 (1-4) + 2(1)
= -1/3 x 7 - 1/2 x (-3) + 2
= -7/3 + 3/2 + 2
= (-14+9+12)/2
= 7/2 satuan luas