Find the axis of symmetry and coordinates of vertex of the graph of the following quadratic functions using the method of completing the square.
A, y=-x^2+7x-4
B, y=3x^2-8x+6
C, y= -1/3x^2+2x-3/2
If I had you could factor that if it was ...but you dont have that 4...or do you...you can rewrite it it as then factor the one part to get your final asnwer as now that you have it in that form to find the axis of symmetry it is just the value that makes the inside of the parenthases zero...so in this case now put it in line form is the axis of symmetry....to find the vertex it is jsut so once you get it in that order its simple