- #1
Hydroxide
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Homework Statement
1) Let A be an n x n matrix with A^2 -4A +5I = 0. Show that n must be even.
2) Let A be an m x n matrix where m<n. Show that det(AT x A) = 0
The Attempt at a Solution
1) (A-2I)^2 +I=0
Not sure what to do after this though
Thanks in advance
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