Question

Find the values of each of the following determinants.

i. \(\begin{vmatrix} 4 &3\\ 2 & 7 \end{vmatrix}\)

ii. \(\begin{vmatrix} 5 &-2\\ -3 & 1 \end{vmatrix}\)

iii. \(\begin{vmatrix} 3 &-1\\ 1 & 4 \end{vmatrix}\)

Answer 1

 i. \(\begin{vmatrix} 4 &3\\ 2 & 7 \end{vmatrix} = (4 × 7) - (3 × 2)\) = 28 - 6

|4, 3||2, 7|