Vertex form is when you complete the square.
(because 3 = 108/36)
For the above example, the vertex is at . It is the number which makes the squared bracket = 0. For Q2 do the same as above then you can find the vertex.
I really unsure how to start with this, any help would be much appreciated
Find the vertex form of the quadratic function y = 3x^2 + 5x + 9
Find the vertex of the parabola which is the graph of the quadratic function y = -2x^2 + 4x + 6