document.write( "Question 402012: Find b and c so that the parabola y=13x^2+bx+c has vertex (6,3) . \r
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Algebra.Com's Answer #284419 by robertb(5830)\"\" \"About 
You can put this solution on YOUR website!
\"k++=+3+=+%284ac+-+b%5E2%29%2F%284a%29+=+%284%2A13%2Ac+-+b%5E2%29%2F52\"\r
\n" ); document.write( "\n" ); document.write( "==> \"156+=+52+c+-+b%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"h+=+6+=+-b%2F%282a%29+=+-b%2F26\"
\n" ); document.write( "==> 156 = -b ==> b = -156.\r
\n" ); document.write( "\n" ); document.write( "==> \"156+=+52c+-+%28-156%29%5E2\"
\n" ); document.write( "==> 3 = c - 468
\n" ); document.write( "==> c = 471.
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