document.write( "Question 388366: how do you factor 3x^2-4x+7? \n" ); document.write( "

Algebra.Com's Answer #274663 by Edwin McCravy(20056) $\"\"$ $\"About$

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\n" ); document.write( "how do you factor 3x^2-4x+7
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document.write( "Multiply 3 by 7, getting 21\r\n" );
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document.write( "Think of all the ways to factor 21 using integers:\r\n" );
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document.write( "21 x 1 = 21\r\n" );
document.write( " 7 x 3 = 21\r\n" );
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document.write( "Since the 7 is positive, list their sums\r\n" );
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document.write( "21 + 1 = 22\r\n" );
document.write( " 7 + 3 = 10\r\n" );
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document.write( "Since the middle coefficient in absolute value, 4 is\r\n" );
document.write( "not listed then the trinomial doesn't factor.  So the \r\n" );
document.write( "trinomial is prime.\r\n" );
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document.write( "Edwin

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