Respuesta :
The value of the |a| is 9 if a is a square matrix of order 2 and |adja|=9.
What is the matrix?
It is defined as the group of numerical data, functions, and complex numbers in a specific way such that the representation array looks like a square, rectangle shape.
We have:
a is a square matrix of order 2 and |adja|=9
As we know:
[tex]\rm |Adj(A)| = |A|^{n-1}[/tex]
A is the square matrix and n is the order of the matrix.
|adja|=9
n = 2
[tex]\rm |a|^{2-1} = 9[/tex]
|a| = 9
Thus, the value of the |a| is 9 if a is a square matrix of order 2 and |adja|=9.
Learn more about the matrix here:
brainly.com/question/9967572
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