Question

if A=[ 1 3] then the determinant A square -
[2 1] 2Ais see the picture ​

Answer 1

Answer:

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Step-by-step explanation:

so first solve this determinant

after solving it we get

A=-5

so thus then

A²-2A

=(-5)²-2×(-5)

=25-(-10)

=25+10

=35