If A = [{2 2 1} {1 3 1} {1 2 2}], then A^3 - 7A^2 + 10A =

Question

If \(A = \begin{bmatrix} 2&2&1\\1&3&1\\1&2&2\end{bmatrix}\), then A³ - 7A² + 10A =

a. 5I + A

b. 5I – A

c. A – 5I

d. 6I

Answer 1

Correct option is b. 5I – A