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{\bf Math 226: Quiz\hfill Jan.\ 27, 1992}

Show your work and circle your final answer.

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1. Let $A = \bmatrix{1 & 2 \cr 3 & -4}$ and $B \bmatrix{0 & 2 & -1\cr 1 & 2 &
0 \cr}$. Compute the matrix product $A\cdot B$.


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2. Solve the set of equations associated with the augmented matrix 
$\bmatrix{
1 & 3 & 2 & 1 & : & 3\cr
0 & 0 & 1 & 2 & : & 5\cr
0 & 0 & 0 & 1 & : & 2\cr}$.


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