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\centerline{\bf Math 226.02/226T.01}
\centerline{\bf Quiz 9}
\centerline{\bf November 20, 1997}
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{\bf Name:}\hskip .5 in \hrule width5cm \hfil

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{\bf 1.} Solve the following system of equations.
$$\matrix
x_1&+ 2x_2 &- 2x_3 &+ x_4 &= 0\\
2x_1 &+ 4x_2 &- 3x_3 &- x_4 &= 1\\
3x_1  &+ \ 6x_2 &- 5x_3 &+ 2x_4 &= 3
\endmatrix
$$
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{\bf Answer:} \hrule width5cm \hfil
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Sign the pledge "On my honor, I have neither given nor received
unauthorized aid on this quiz."
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{\bf Signature:} \hrule width5cm \hfil


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