Write the value of the determinant 
.
We need to find the value of determinant
Determinant of 3 × 3 matrices is found as,
So,
Re-arranging the equation,
Using the algebraic identity,
(a + b)(a – b) = a2 – b2
Thus, the value of 
is 0.
1
Write the value of the determinant .
We need to find the value of determinant
Determinant of 3 × 3 matrices is found as,
So,
Re-arranging the equation,
Using the algebraic identity,
(a + b)(a – b) = a2 – b2
Thus, the value of is 0.