Matrix of Minors to Cofactor Matrix (2x2) - Single Row or Column

Question

Which shows column 2 of the cofactor matrix of this matrix of minors? Fill only that column and leave the other entries blank. Apply the sign pattern $(-1)^{i+j}$ to each entry of the matrix of minors.

$$\left[ {\begin{array} {cc} 7 & \fcolorbox{#1b7f3b}{#e6f7ec}{$3$} \ -9 & \fcolorbox{#1b7f3b}{#e6f7ec}{$-3$} \end{array}  } ight]$$

Accepted Answer

$$\left[ {\begin{array} {cc} \square & -3 \ \square & -3 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {cc} \square & 0 \ \square & -5 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {cc} \square & -4 \ \square & 0 \end{array}  } ight]$$

Answer

$$\left[ {\begin{array} {cc} \square & -6 \ \square & -2 \end{array}  } ight]$$

Practice: Matrices

On this page:

Practice:

Matrix of Minors to Cofactor Matrix (2x2) - Single Row or Column