document.write( "Question 73164: I have one more question I couldn't figure out. Thanks for the help, your a life saver! Thanks\r
\n" ); document.write( "\n" ); document.write( "Find the maximum or minimum value of y=(x+9)(x-9) and determine for which value of x it occurs\r
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Algebra.Com's Answer #52447 by ankor@dixie-net.com(22740)\"\" \"About 
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Find the maximum or minimum value of y=(x+9)(x-9) and determine for which value of x it occurs
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\n" ); document.write( "Just think about it. You know that the parabola crosses the x axis(y=0) at + 9 and
\n" ); document.write( "-9. The vertex will be half-way between these two points, Halfway between +9 and -9 is 0, right? So the value of x that the minimum occurs is 0
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