Question

Vertex: (-1,4) Point: (1,8)

Answer 1

See below

Explanation:

I assume you want the quadratic that has these values

Vertex form of this parabola

y = a(x- - 1)^2 + 4 insert the given point to calculate 'a'

8 = a (1 + 1)^2 + 4 shows a = 1

y = (x+1)^2 + 4 expand this vertex form to get the quadratic form

y = x^2 + 2x + 5