document.write( "Question 549621: reduce the matrix in the form of low level:\r
\n" ); document.write( "\n" ); document.write( "1 -2 3 -1
\n" ); document.write( "2 -1 2 2
\n" ); document.write( "3 1 2 3\r
\n" ); document.write( "\n" ); document.write( "the answer is supposed to be \r
\n" ); document.write( "\n" ); document.write( "1 0 0 15/7
\n" ); document.write( "0 1 0 -4/7
\n" ); document.write( "0 0 1 -10/7\r
\n" ); document.write( "
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Algebra.Com's Answer #357964 by KMST(5396) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C2%2C-1%2C2%2C2%2C3%2C1%2C2%2C3%29%29\"$ Add (-2) times row 1 to row 2, (-3) times row 1 to row 3 to get
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C0%2C3%2C-4%2C4%2C0%2C7%2C-7%2C6%29%29\"$ Combine 3 times row 3 plus (-7) times row 2 and replace row 3 with the result.
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C0%2C3%2C-4%2C4%2C0%2C0%2C7%2C-10%29%29\"$ Divide row 3 by 7
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C0%2C3%2C-4%2C4%2C0%2C0%2C1%2C-10%2F7%29%29\"$ Add 4 times row 3 to row 2
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C0%2C3%2C0%2C-12%2F7%2C0%2C0%2C1%2C-10%2F7%29%29\"$ Divide row 2 by 3
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C-2%2C3%2C-1%2C0%2C1%2C0%2C-4%2F7%2C0%2C0%2C1%2C-10%2F7%29%29\"$ Add 2 times row 2 and (-3) times row 3 to row 1
\n" ); document.write( " $\"%28matrix%283%2C4%2C1%2C0%2C0%2C15%2F7%2C0%2C1%2C0%2C-4%2F7%2C0%2C0%2C1%2C-10%2F7%29%29\"$ \n" ); document.write( "

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