document.write( "Question 737763: What is the Y coordinate of the vertex for the quadratic: y = x^2 -8x -9
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Algebra.Com's Answer #450546 by Susan-math(40)\"\" \"About 
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Find \"x=-b%2F%282a%29=-%28-8%29%2F%28%282%281%29%29%29=4\"\r
\n" ); document.write( "\n" ); document.write( "then substitute that for x to find the corresponding y:\r
\n" ); document.write( "\n" ); document.write( "So \"y+=+%284%29%5E2=8%284%29-9=-25\"
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