without expanding the determinant show that-
5 15 -25
7 21 30
8 24 42
=0
⇒ ∆ = 0 [ If each element of a row (or column) of a determinant is zero, then its value is zero].
without expanding the determinant show that-
⇒ ∆ = 0 [ If each element of a row (or column) of a determinant is zero, then its value is zero].