I need the work too! Numbers in pink are the exponents. Thank you!

Solve a 5th Degree Polynomial to be Graphed:

4x5+8x4-25x3-20x2+51x-18

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By the Rational Root Theorem, the numerator of the zero is a factor of the constant term and the denominator of the root is a factor of the leading coefficient.

So, we look at -18 and 4. The roots will be factors of these.

We know one is a factor. Try it.

Divide x-1 into it and if it reduces to a 4th power you have a root.



So, 1 is a root. There's one down and 4 to go.

Then, keep going.

Try dividing x+2 into the fourth power poly you got. If it reduces to a cubic, there's another root.



It reduced to a cubic, therefore, -2 is a root. 3 to go.

And so on.

I got to go now, but I will be back to check on your progress.

Also, you can easily find the roots by just graphing this one. It is a nice one because it has 5 real roots.

Just look at the places where it crosses the x axis. Those are your roots.

If you do not have a calculator, go here and download this free graphing utility that I just used.

http://www.padowan.dk/graph/

I found all my zeros but now I'm trying to figure out my max's and minutes and why intercept

Are you in a calc class?