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10.05 Cofactors and determinants

Interactive practice questions

Consider the following matrix

    $4$4 $0$0 $8$8    
    $6$6 $9$9 $5$5    
    $7$7 $2$2 $3$3    
a

Find the cofactor of the element $6$6.

b

Find the cofactor of the element $9$9.

c

Find the cofactor of the element $5$5.

Easy
7min

Consider the following matrix

    $7$7 $5$5 $2$2    
    $0$0 $3$3 $-4$4    
    $-6$6 $1$1 $-8$8    
Easy
6min

Consider the following matrix

    $-8$8 $0$0 $1$1    
    $6$6 $9$9 $2$2    
    $5$5 $4$4 $-7$7    
Easy
6min

Consider the following matrix

    $3$3 $-5$5 $9$9    
    $2$2 $1$1 $6$6    
    $7$7 $4$4 $-8$8    
Easy
7min
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