document.write( "Question 169287: I need to find the inverse of the matrix
\n" ); document.write( "[ -6 15 ] I tried but it doesn't look right.
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Algebra.Com's Answer #124885 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
The inverse of a 2x2 matrix, [A], defined by
\n" ); document.write( " $\"%28matrix%282%2C2%2Ca%2Cb%2Cc%2Cd%29%29\"$
\n" ); document.write( "is given by
\n" ); document.write( " $\"DELTA%2A%28matrix%282%2C2%2Cd%2C-b%2C-c%2Ca%29%29\"$
\n" ); document.write( "where
\n" ); document.write( " $\"DELTA=%281%2F%28ad-bc%29%29\"$
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\n" ); document.write( "In your case,
\n" ); document.write( " $\"DELTA=%281%2F%28%28-6%29%28-8%29-5%2815%29%29%29\"$
\n" ); document.write( " $\"DELTA=%281%2F%2848-75%29%29\"$
\n" ); document.write( " $\"DELTA=-%281%2F27%29\"$
\n" ); document.write( " $\"-%281%2F27%29%2A%28matrix%282%2C2%2C-8%2C-15%2C-5%2C-6%29%29\"$
\n" ); document.write( " $\"%28matrix%282%2C2%2C8%2F27%2C15%2F27%2C5%2F27%2C6%2F27%29%29\"$
\n" ); document.write( " $\"%28matrix%282%2C2%2C8%2F27%2C5%2F9%2C5%2F27%2C2%2F9%29%29\"$ \n" ); document.write( "

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