We are given the following expression:
-2|x-3|
To evaluate it at x = -1, we replace x by -1. So
-2|-1 -3| = -2|-4| = -2*4 = -8
To evaluate it at x = 2, we replace x by 2. So
-2|2 - 3| = -2|-1| = -2*1 = -2
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