Question

Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.

f(x) = x2 + 2x - 9

Answer 1

Can someone help me?

Answer 2

Help?

Answer 3

Can someone help me???

Answer 4

There are multiple ways of doing this.
I will show you the method of making a perfect square.
f(x) = x^2 + 2x - 9
f(x)=(x+1)^2 -10
as (x+1)^2=x^2+2x+1

(x+1)^2 is always positive or 0, at x=-1 it will be 0, at any other point it will take higher values. Thus the function will have its minimal value at x=-1,
where it will take (-1+1)^2 -10=0-10=-10
So the x,y coordinates are (-1,-10). Minimal point

Answer 5

@Andras I got Vertex: (−1,−10)

Answer 6

Can anyone help me????

Answer 7

Help????????

Answer 8

What is wrong. U got the same thing I wrote. Make a graph to help you understand it.