Answer
-1
Work Step by Step
$\int^{\sqrt 2}_{0}(t-\sqrt {2})dt=\int^{\sqrt 2}_{0}tdt- \sqrt {2}\int^{\sqrt 2} _{0}dt$
$=\frac{(\sqrt {2})^{2}}{2}-\sqrt {2}(\sqrt {2}-0)= \frac{2}{2}-2= -1$
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