Question

If $A= \begin{bmatrix}1 & 0 \\\[0.3em]-1 & 5 \\\[0.3em] \end{bmatrix}$ and $I= \begin{bmatrix}1& 0\\\[0.3em]0& 1\\\[0.3em] \end{bmatrix}$ then the value of k so that $A^2 = 6A + kI$ is given by:

• A. 5
• B. -5
• C. -6
• D. 6

Answer 1

Answer: (B)

-5

Answer 2

The correct option is (B): -5