6)         (-4     1)  Find a diagonal matrix D such that A = PDP-1 where P is an invertible matrix.

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
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Chapter7: Eigenvalues And Eigenvectors
Section7.CR: Review Exercises
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If 

A = (-9     6) 

       (-4     1) 

Find a diagonal matrix D such that A = PDP-1 where P is an invertible matrix. 

The matrix D = (a     0)

                         (0     d)

where a = ___ and d = ___. 

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