Question 50
Find the mi.nor of element 8 in the determinant $$\triangle = \begin{bmatrix}1 & 4 & 6 \\2 & 5 & 9\\8 & 7 & 12 \end{bmatrix}$$
Solution
$$\text{Minor of 8} = \begin{vmatrix} 4 & 6 \\ 5 & 9 \end{vmatrix}$$
==> $$\text{Value} = (4 \times 9) - (6 \times 5)$$
==> 6.
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