If \(A = \left( {\begin{array}{*{20}{c}} 1&2\\ 2&3 \end{array}} \right)\) and \(B = \left( {\begin{array}{*{20}{c}} 1&0\\ 1&0 \end{array}} \right)\) then what is determinant of AB?

If \(A = \left( {\begin{array}{*{20}{c}} 1&2\\ 2&3 \end{array}} \righ

1.	If \(A = \left( {\begin{array}{{20}{c}} 1&2\\ 2&3 \end{array}} \right)\) and \(B = \left( {\begin{array}{{20}{c}} 1&0\\ 1&0 \end{array}} \right)\) then what is determinant of AB?
A.	0
B.	1
C.	10
D.	20
Answer» B. 1