Question

vertex of f(x)=(x+3)^2

Answer 1

Well, you're in luck
When you have your parabola in this form
f(x) = (x - h)² + k
Then your vertex is at the point (h , k)

Answer 2

Yea but what are the numbers?

Answer 3

What indeed... ;)
Observe it more carefully...
f(x) = (x+3)²
f(x) = (x-h)² + k
So what are h and k?

Answer 4

-3, 0?

Answer 5

There you go ^.^