#### Question

Find cofactors of the elements of the matrix A = `[[-1,2],[-3,4]]`

#### Solution

Cofactors are

`A_11=(-1)^1+1(4)=4`

`A_12= (-1)^1+2(-3)=3`

`A _21=(-1)^2+1(2)=-2`

`A_22=(-1)^2+2(-1)=-1`

∴ Co-factors matrix `[[A_11,A_12],[A_21,A_22]]`= `[[4,3],[-2,-1]]`

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#### APPEARS IN

Solution Find Cofactors of the Elements of the Matrix a = [ − 1 2 − 3 4 ] Concept: Introduction of Matrices.