Question

How do you write `y=x^2-10x+4` in vertex form?

Answer 1

In vertex form : `y= (x-5)^2 -21`

Explanation:

`y= x^2 -10x +4 or y= x^2 -10x + 25 -25+4 = (x-5)^2 -21`

Vertex is at `(5,-21)`. [Compare with standard form `y=a(x-h)^2+k ; (h,k)` is vertex] graph{x^2-10x+4 [-80, 80, -40, 40]} [Ans]