Question

What is the vertex of the graph of this function?
y = -(x - 3)(x+1)
Do I distribute the negative in first?

Answer 1

well it roots of the parabola are x = -1 and 3

the x value of the vertex is half way between the roots..

so x =(-1 + 3)/2

to find the y value of the vertex, substitute your x value and evaluate.

hope it helps

Answer 2

If I sub in the x value, I'd distribute from there right?
(1 - 3)(1 + 1)

Answer 3

I always get lost on this step...

Answer 4

yes but its

y = -(1 -3)(1 + 1)

Answer 5

so you are looking at

y = -(-2 x 2)

Answer 6

@.@ I'm so lost...
Wait... I think I see it...
-(-4)
Which would give me y = 4 right?