$\left|\displaystyle\int_{-2}^1 x^2 + x - 2\ dx\right| = \left| \left. \left(\dfrac{x^3}{3} + \dfrac{x^2}{2} - 2x\right)\right|_{-2}^1 \right| = \left| \dfrac{1}{3} + \dfrac{1}{2} - 2 + \dfrac{8}{3} - 2 - 4 \right| =$
$= \left| -\dfrac{9}{2}\right| = \fbox{$\dfrac{9}{2}$}$
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