Posted by zach w on Wednesday, November 14, 2012 at 12:26pm.
F(X)= 3x^2 30x70
what is the vertex
what is the axsis of symmetry
what are the intercept
what is the domain
what is the range
intervals increase
intervals decrease

college algebra  Steve, Wednesday, November 14, 2012 at 1:54pm
you can see it's a parabola. By completing the square, you get
y = 3(x^2 + 10x + 25) + 5
y = 3(x+5)^2 + 5
you should be able to read off most of the answers you need from that.

college algebra  zach w, Wednesday, November 14, 2012 at 2:07pm
im still having a hard time please help a little more

college algebra  Steve, Wednesday, November 14, 2012 at 2:20pm
review what you know about the parabola
y = a(xh)^2 + k
Here, we have
y = 3(x+5)^2 + 5
vertex at (5,2)
axis at x = 5
yintercept at (0,5)
xintercepts where 3x^2+30x+70 = 0, or
x = 1/3 (15±√15)
domain is all reals
range is all reals <= 5
increase for x < 5
decrease for x > 5
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