document.write( "Question 133680: find the position of a vertex for the graph of the function f(x) = x to the second power+6x+7\r
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Algebra.Com's Answer #97826 by scott8148(6628)\"\" \"About 
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the vertex is on the axis of symmetry\r
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\n" ); document.write( "\n" ); document.write( "for a quadratic of the form ax^2+bx+c, the equation for the axis is x=-b/2a\r
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\n" ); document.write( "\n" ); document.write( "x=-6/2 or x=-3\r
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\n" ); document.write( "\n" ); document.write( "to find the y-coordinate, substitute into the equation __ y=(-3)^2+6(-3)+7 __ y=-2\r
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\n" ); document.write( "\n" ); document.write( "so the vertex is (-3,-2)
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