document.write( "Question 737760: What is the X coordinate of the vertex for the quadratic: y = x^2 -8x -9
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Algebra.Com's Answer #450548 by Susan-math(40)\"\" \"About 
You can put this solution on YOUR website!
use \"x=-b%2F%282a%29=-%288%29%2F%282%281%29%29=4\" \n" ); document.write( "
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