document.write( "Question 969027: Show without expanding that x = 2 is a root of the equation\r
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\n" ); document.write( "| 2 -3x x - 3| ==0 and solve it completely.
\n" ); document.write( "|-3 2x x + 2|
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Algebra.Com's Answer #592054 by Edwin McCravy(20056) $\"\"$ $\"About$

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Show without expanding that x = 2 is a root of the equation
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document.write( " and solve it completely.\r\n" );
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document.write( "Substitute x=2 in the determinant\r\n" );
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document.write( "The first two rows are the same, so if you subtract\r\n" );
document.write( "the second row from the top row you get\r\n" );
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document.write( "If this were expanded about the top row, all the minors\r\n" );
document.write( "would be multiplied by 0 giving 0.\r\n" );
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document.write( "Edwin

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