Without expanding the determinants show that :

42 1 6

28 7 4

14 3 2

=0

⇒ Δ = 7 × 0 (**If any two rows(or columns) of a square matrix are identical, then its determinant is zero**)

⇒ Δ = 0

**
**

Without expanding the determinants show that :

42 1 6

28 7 4

14 3 2

=0

⇒ Δ = 7 × 0 (**If any two rows(or columns) of a square matrix are identical, then its determinant is zero**)

⇒ Δ = 0

**
**

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