Question
$\int_{\, - 2}^{\,2} {|x|\,dx = } $
$ = - \left[ {\frac{{{x^2}}}{2}} \right]_{ - 2}^0 + \left[ {\frac{{{x^2}}}{2}} \right]_0^2$
$ = - ( - 2) + (2) = 4$.
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