1 15. Consider the matrix A = |1 -2 2r – 4 where r is a constant. 1 -r + 2 The values of r for which A is diagonalizable are (A) r ER\ {0, -1} (B) r E R \ {–1} (C) r E R \ {0} (D) r E R \ {0,1} (E) r...

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Extracted text: 1 15. Consider the matrix A = |1 -2 2r – 4 where r is a constant. 1 -r + 2 The values of r for which A is diagonalizable are (A) r ER\ {0, -1} (B) r E R \ {–1} (C) r E R \ {0} (D) r E R \ {0,1} (E) r E R \ {1}