2000017405

Level: 
Project ID: 
2000017405
Accepted: 
0
Clonable: 
0
Easy: 
0
For what value of \(a\) does the product given below result in a diagonal matrix? \[ \left (\array{ 3& -2\cr a & -2 \cr } \right ) \cdot \left (\array{ 4& 4 \cr 10 & 6 \cr } \right ) \]
\(5\)
\(-5\)
\(4\)
\(-4\)
Fixed Answer: 
None