Question

What is the vertex of `y= 3x^2-9x+27`?

Answer 1

`Vertex (3/2, 81/4)`

Explanation:

x-coordinate of vertex:
`x = -b/(2a) = 9/6 = 3/2`
y-coordinate of vertex:
`y(3/2) = 3(9/4) - 9(3/2) + 27 = -27/4 + 108/4 = 81/4`

`Vertex (3/2, 81/4)`