Consider the matrices A=\left[\begin{array}{ccc}x & y & 0 \ -3 & 1 & 2 \ 1 & -2 & z ]\end{array}\text{ and } B=\left[\begin{array}{ccc}1 & -2 & -2 \ 2 & 0 & 1 \ 2 & 1 & 0 ]\end{array} If the cofactors of the elements {z}, 1 in 3^{\text{rd }} row and x of A are 9,4,3 respectively then A B= [AP EAPCET 22 May 2025 S1]

Correct Answer is : [7−6−4387−5−3−4]

\left[\begin{array}{ccc}-7 & -4 & -8 \ -1 & 8 & 7 \ 3 & -3 & -4]\end{array}

\left[\begin{array}{ccc}7 & -6 & 8 \ -5 & 4 & -5 \ -5 & -3 & -4]\end{array}

\left[\begin{array}{ccc}7 & -6 & -4 \ 3 & 8 & 7 \ -5 & -3 & -4]\end{array}

\left[\begin{array}{ccc}7 & -6 & 8 \ -1 & 8 & -5 \ 3 & -3 & -4]\end{array}

Matrices and Determinants

Section: Mathematics

Question : 16 of 48

Marks: +1, -0

Consider the matrices A=[

]‌ and ‌B=[

] If the cofactors of the elements z,1 in 3‌rd ‌ row and x of A are 9,4,3 respectively then AB=

[AP EAPCET 22 May 2025 S1]

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