document.write( "Question 453073: find vertex of porabola y = 6 x + 7 - x^2 \n" ); document.write( "

Algebra.Com's Answer #311306 by nerdybill(7384) $\"\"$ $\"About$

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y = 6 x + 7 - x^2
\n" ); document.write( "rearranging:
\n" ); document.write( "y = -x^2 + 6x + 7
\n" ); document.write( ".
\n" ); document.write( "The x-coordinate of the vertex is at:
\n" ); document.write( "x = -b/(2a) = -6/(2*(-1)) = -6/(-2) = 3
\n" ); document.write( ".
\n" ); document.write( "The y-coordinate:
\n" ); document.write( "y = -x^2 + 6x + 7
\n" ); document.write( "y = -3^2 + 6(3) + 7
\n" ); document.write( "y = -9 + 18 + 7
\n" ); document.write( "y = 16
\n" ); document.write( ".
\n" ); document.write( "Answer: (3, 16) \n" ); document.write( "

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