There is a store downtown that sells clothes. The owner has his own method of pricing items. A coat costs $20, a hat costs $15,
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Answer:
Verified
Step-by-step explanation:
Let the diagonal matrix D with size 2x2 be in the form of
Then the determinant of matrix D would be
det(D) = a*d - 0*0 = ad
This is the product of the matrix's diagonal numbers
So the theorem is true for 2x2 matrices