SOLUTION: I am having trouble with this problem... Quadratic: y=x^2-6x+8 1). what are the x-intercepts? 2). what is the domain? 3). what is the range? thank you so much for your hel

Question 1159347: I am having trouble with this problem...
Quadratic: y=x^2-6x+8
1). what are the x-intercepts?
2). what is the domain?
3). what is the range?
thank you so much for your help
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
y is greater than or equal to -1, for range.
x can be any real value, for domain.

x-intercepts at 2 and 4.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Quadratic:
......factor

1). what are the x-intercepts?
set

if ->
if ->
the x-intercepts are: and

2). what is the domain?
(all real numbers) (it's parabola)

3). what is the range?
since it's parabola that opens up, it's vertex is a minimum and range is all real numbers above y-coordinate of the vertex
so, rewrite equation in vertex form
.......complete square

......

-> and -> vertex is at (,)
so, the range is:
{ element : }

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