document.write( "Question 485964: Use the vertex formula to find the vertex of the quadratic function
\n" ); document.write( "f(x)=-x^2+6x-11\r
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Algebra.Com's Answer #332288 by rfer(16322)\"\" \"About 
You can put this solution on YOUR website!
vertex=(3,-2) \n" ); document.write( "
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