document.write( "Question 137422: I am soo confused on how to represent numbers with matrices. Such as [3 -2 1]
\n" ); document.write( " [2 1 -4}
\n" ); document.write( " A=2x3
\n" ); document.write( "It says that the special location for -2 is 12.And that -4 is a23. I dont know how to figure those out.\r
\n" ); document.write( "\n" ); document.write( "I was wondering how they figured that out.\r
\n" ); document.write( "\n" ); document.write( " THANKS! \n" ); document.write( "

Algebra.Com's Answer #100564 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!
I am soo confused on how to represent numbers with matrices. Such as [3 -2 1]
\n" ); document.write( "[2 1 -4}
\n" ); document.write( "A=2x3
\n" ); document.write( "It says that the special location for -2 is 12.And that -4 is a23. I dont know how to figure those out.
\n" ); document.write( "I was wondering how they figured that out.
\n" ); document.write( "THANKS!
\n" ); document.write( "
\n" ); document.write( "They are just two digit side by side and the first digit tells what row
\n" ); document.write( "a certain number is in, while the second digit tells what column that
\n" ); document.write( "certain number is in.
\n" ); document.write( "`
\n" ); document.write( " $\"%28matrix%282%2C3%2C4%2C-2%2C1%2C3%2C1%2C-4%29%29\"$
\n" ); document.write( "`
\n" ); document.write( "The special location for the $\"4\"$ is called $\"11\"$ , which does NOT mean \"eleven\" even though it looks exactly like \"eleven\". It is read \"one one\" which means that $\"4\"$ is in row $\"1\"$ and column $\"1\"$ .
\n" ); document.write( "`
\n" ); document.write( "The special location for the $\"-2\"$ is called $\"12\"$ , which does NOT mean \"twelve\" even though it looks exactly like \"twelve\". It is read \"one two\" which means that $\"-2\"$ is in row $\"1\"$ and column $\"2\"$ .
\n" ); document.write( "`
\n" ); document.write( "The special location for the upper $\"1\"$ is called $\"13\"$ , which does NOT mean \"thirteen\" even though it looks exactly like \"thirteen\". It is read \"one three\" which means that the upper $\"1\"$ is in row $\"1\"$ and column $\"3\"$ .
\n" ); document.write( "`
\n" ); document.write( "The special location for the $\"3\"$ is called $\"21\"$ , which does NOT mean \"twenty-one\" even though it looks exactly like \"twenty-one\". It is read \"two one\" which means that $\"3\"$ is in row $\"2\"$ and column $\"1\"$ .
\n" ); document.write( "`
\n" ); document.write( "The special location for the lower $\"1\"$ is called $\"22\"$ , which does NOT mean \"twenty-two\" even though it looks exactly like \"twenty-two\". It is read \"two two\" which means that the lower $\"1\"$ is in row $\"2\"$ and column $\"2\"$ .
\n" ); document.write( "`
\n" ); document.write( "The special location for the $\"-4\"$ is called $\"23\"$ , which does NOT mean \"twenty-three\" even though it looks exactly like \"twenty-three\". It is read \"two three\" which means that the $\"-4\"$ is in row $\"2\"$ and column $\"3\"$ .
\n" ); document.write( "`
\n" ); document.write( "Oftentimes a general matrix, say a 4x5 matrix, will be written
\n" ); document.write( "`
\n" ); document.write( "[a₁₁ a₁₂ a₁₃ a₁₄ a₁₅]
\n" ); document.write( "[a₂₁ a₂₂ a₂₃ a₂₄ a₂₅]
\n" ); document.write( "[a₃₁ a₃₂ a₃₃ a₃₄ a₃₅]
\n" ); document.write( "[a₄₁ a₄₂ a₄₃ a₄₄ a₄₅]
\n" ); document.write( "`
\n" ); document.write( "The two digits are written as subscripts. You might remember the word
\n" ); document.write( "\"arc\" to remember \"a_RC\", where the R stands for the row
\n" ); document.write( "and the C stands for the column.
\n" ); document.write( "`
\n" ); document.write( "Edwin \n" ); document.write( "

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