Question 1034982
Hi there,
y = 9x^2 - 54x + 78
a = 9, b = -54, c = 78
Vertex = -b/2a
Vertex = 54/18 = 3
x = 3
This is the axis of symmetry.
x = 3
Substitute in:-
y = 9x^2 - 54x + 78
y = 9(3)^2 - 54(3) + 78
y = -3
Vertex (3,-3)
Hope this helps :-)