document.write( "Question 177030: Hello!
\n" ); document.write( "How do I solve this determinant problem.
\n" ); document.write( "I know the answer is 5/3 , -1 but am not sure how?
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\n" ); document.write( "for x. \n" ); document.write( "

Algebra.Com's Answer #132088 by Edwin McCravy(20054) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "Edwin's solution follows. You do not need the quadratic formula, as the resulting quadratic factors:
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document.write( "First you have to learn how to find the value of\r\n" );
document.write( "a 3x3 determinant:\r\n" );
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document.write( "Suppose you have the 3x3 determinant:\r\n" );
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document.write( "Copy the first two columns over on the right:\r\n" );
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document.write( "Then add the products of the three diagonals that go down to the\r\n" );
document.write( "RIGHT:  +AEI+BFG+CDH\r\n" );
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document.write( "Then subtract the products of the three diagonals that go down to the\r\n" );
document.write( "LEFT:  -CEG-AFH-BDI\r\n" );
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document.write( "So \r\n" );
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document.write( "Evaluate the determinant according to the rules \r\n" );
document.write( "above or whatever rules you learned. There are more\r\n" );
document.write( "than one possible set of rules for this.  Use \r\n" );
document.write( "whatever method you have studied.  If you use the \r\n" );
document.write( "method above, you'll copy the first two columns over:\r\n" );
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document.write( "Then\r\n" );
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document.write( "So there are two solutions,  and \r\n" );
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document.write( "Edwin

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