Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
A
=
[
1
2
2
3
]
A = \begin{bmatrix} 1 & 2 \\ 2 & 3 \end{bmatrix}
A
=
[
1
2
2
3
]
and
A
2
−
λ
A
−
I
2
=
O
A^2 - \lambda A - I_2 = O
A
2
−
λ
A
−
I
2
=
O
, then
λ
\lambda
λ
is equal to a. -4 b. -2 c. 2 d. 4
Browse the problem library