Mathematics · Matrices and Determinants

If A is a 3×3 matrix with rows (1, 2, 2), (2, 1, 2), and (2, 2, 1), then what is A2 - 4A equal to? (where I3 is the 3×3 identity matrix)

Verified Solution4 OptionsUpdated: October 2026👁️1 View

15I3✓
2I3
3-I3
4-5I3

Correct answer

5I3

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If A is a 3×3 matrix with rows (1, 2, 2), (2, 1, 2), and (2, 2, 1), then what is A2 - 4A equal to? (where I3 is the 3×3 identity matrix)

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If A is a 3×3 matrix with rows (1, 2, 2), (2, 1, 2), and (2, 2, 1), then what is A2 - 4A equal to? (where I3 is the 3×3 identity matrix)

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