Explain the fact “Cofactors are useful when matrices have many zeros”.

Intermediate Algebra
19th Edition
ISBN:9780998625720
Author:Lynn Marecek
Publisher:Lynn Marecek
Chapter4: Systems Of Linear Equations
Section4.6: Solve Systems Of Equations Using Determinants
Problem 277E: Explain what is meant by the minor of an entry in a square matrix.
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Explain the fact “Cofactors are useful when matrices have many zeros”.

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