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...Lecture applications of determinants minors and cofactors a matrix let definition given the minor aij mij is determinant obtained from by removing ith row jth column aa m deleting st mmm mm cofactor c ijm ij signs for x linear algebra math page element scalar i j multiplying together term example find all solution note method det above equations can be used to check that are found correctly as values must equal we open any or using in last expanding first opening second third value will same...