document.write( "Question 167529: The graph of f (x) = ax2 + bx + c passes
\n" ); document.write( "through the points (1, k1), (2, k2), and (3, k3). Determine a,
\n" ); document.write( "b, and c for
\n" ); document.write( "(A) k1=-2, k2 = 1, k3 = 6
\n" ); document.write( "(B) k1 = 4, k2 = 3, k3=-2
\n" ); document.write( "(C) k1 = 8, k2=-5, k3 = 4\r
\n" ); document.write( "\n" ); document.write( "I attempted to solve as follows:\r
\n" ); document.write( "\n" ); document.write( "(A)-2= a + b + c
\n" ); document.write( " 1= a - b + c
\n" ); document.write( " 6= 4a + 2b +c
\n" ); document.write( "and entering this into a matrix, but it doesn't come out right.\r
\n" ); document.write( "\n" ); document.write( "What am I doing wrong?\r
\n" ); document.write( "\n" ); document.write( "Thank you!\r
\n" ); document.write( "\n" ); document.write( "Debi \n" ); document.write( "

Algebra.Com's Answer #123477 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!
The graph of $\"f%28x%29+=+ax%5E2+%2B+bx+%2B+c\"$ passes
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document.write( "Plug  in:\r\n" );
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document.write( "Now since the graph passes through \r\n" );
document.write( "then , so substitute  for  in\r\n" );
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document.write( "then , so substitute  for  in\r\n" );
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document.write( "Now since the graph passes through \r\n" );
document.write( "then , so substitute  for  in\r\n" );
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document.write( " or\r\n" );
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document.write( "So we have this system:\r\n" );
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document.write( "the system\r\n" );
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document.write( "becomes\r\n" );
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document.write( "Solve this system and get \r\n" );
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document.write( "(B) \r\n" );
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document.write( "Solve this system and get \r\n" );
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document.write( "(C) \r\n" );
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document.write( "the system\r\n" );
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document.write( "becomes\r\n" );
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document.write( "Solve this system and get \r\n" );
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document.write( "Edwin

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