document.write( "Question 199751: I need to use factoring to solve an equation. I know the procedure but need to review one thing:
\n" ); document.write( "Solve: -2x^2 + 13x -21 =0
\n" ); document.write( "I know this becomes:
\n" ); document.write( " 2x^2 -13x +21 + 0\r
\n" ); document.write( "\n" ); document.write( " (2x ) (x )
\n" ); document.write( "what I need is what goes in each parenthenes. the correct products of -21 should equal the sum of -13. I only see 21 x -1, -21 x 1, 7 x -3, and -7 x 3. But none of these add up to -13.
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Algebra.Com's Answer #150130 by rfer(16322)\"\" \"About 
You can put this solution on YOUR website!
I am with you, I don't see a solution right off hand. \n" ); document.write( "
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