Q. 46 Consider the following 2 × 2 matrix A where two elements are unknown and are marked by a and b. The eigenvalues of this matrix are –1 and 7. What are the values of a and b?
A = | 1 4 | | b a |
(A) a = 6, b = 4
(B) a = 4, b = 6
(C) a = 3, b = 5
(D) a = 5, b = 3
Answer: (D)
Explanation: