Question

if the value of the determinat of x​

Answer 1

$\bold\green{Determinent \: Value \: of \: x}$

To work out the determinant of a 3×3 matrix:

=>> Multiply a by the determinant of the 2×2 matrix that is not in a's row or column.

=>> Likewise for b, and for c.

=>> Sum them up, but remember the minus in front of the b.