Posted by **Miley** on Wednesday, February 13, 2008 at 4:50pm.

I know how to graph polynomial functions, but i'm having a hard time getting the second point on this one.

f(x)=x(x-1)(x+2)(x+2).

I graphed my zeros and made the right arrow go up and the left arrow go down. I plotted my first point by pluggin in -1. My first point is (-1,2). On my answer sheet there is a point at (1,-1.5). How do i know that i need to solve for another point? And how to i get the point (1, -1.5)?

- Alg. 2 -
**Damon**, Wednesday, February 13, 2008 at 5:24pm
highest x power is x^4, even, always + so

as x gets big -, f gets big +

as x gets big +, f gets big +

so I do not understand your little arrow on the left.

Now as far as I know, f(x) is 0 at x = 1, so there is no point at (1,-1.5)

however guessing what might be intended if x = -1.5, f(-1.5) =

(-1.5)(-2.5)(.5)(.5)

= .9375

oh well, I do not know why you see that point in the answer.

- Alg. 2 -
**Damon**, Wednesday, February 13, 2008 at 5:42pm
well, try that point

f(.5) = .5*-.5*2.5*2.5 = -1.56

so I get

(.5, -1.56)

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