1.

The value of the determinant\(\left| {\begin{array}{*{20}{c}} { - {a^2}}&{ab}&{ac}\\ {ab\;}&{ - {b^2}}&{bc}\\ {ac}&{bc}&{ - {c^2}} \end{array}} \right|\)

A. 0
B. -(a2 + b2 + c2)
C. 4a2 b2 c2
D. 2(ac + bc + ca)
Answer» D. 2(ac + bc + ca)


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