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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _make_A_and_part_of_b_adjacent(self, ref_crds):
 """ Make A and part of b. See docstring of this class for answer to "What are A and b?" """

        rot = self._rotate_rows(ref_crds)
        A = 2*(rot - ref_crds)
        partial_b = (rot**2 - ref_crds**2).sum(1)
        return A, partial_b