document.write( "Question 1034982: For the quadratic function, write the equation of the axis of symmetry, and find the coordinates of the vertex. y=9xsquared-54x+78 \n" ); document.write( "
Algebra.Com's Answer #649623 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Hi there, \n" ); document.write( "y = 9x^2 - 54x + 78 \n" ); document.write( "a = 9, b = -54, c = 78 \n" ); document.write( "Vertex = -b/2a \n" ); document.write( "Vertex = 54/18 = 3 \n" ); document.write( "x = 3 \n" ); document.write( "This is the axis of symmetry. \n" ); document.write( "x = 3 \n" ); document.write( "Substitute in:- \n" ); document.write( "y = 9x^2 - 54x + 78 \n" ); document.write( "y = 9(3)^2 - 54(3) + 78 \n" ); document.write( "y = -3 \n" ); document.write( "Vertex (3,-3) \n" ); document.write( "Hope this helps :-) \n" ); document.write( " \n" ); document.write( " |