limited area of a curve

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The answer is 8au but I have a difficult time to understand why, can anybody explain? Question: Calculate the total area that is limited by the curve $$y = x^3 -4x$$ and the $x$-axis. Also if the question doesn't make sense, it's because I directly translated it so ask if there is something which doesn't make sense!

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Draw a picture ! Then you should see that the area is given by

$\int_{-2}^0 (x^3-4x)dx +|\int_{0}^2 (x^3-4x)dx|$.