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I'm trying to learn to factor polynomials, and I'm trying to graph

$$30x^5 – 166x^4 – 542x^3 + 2838x^2 + 1520x – 800$$

from here on Purplemath.

When I graph polynomials on my NSpire CS CAX or here it doesn't match up with what the picture gives. What am I doing wrong?

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    We have no way of knowing what you're doing wrong if you don't tell us what you did. Are you sure you entered it correctly? Are you sure the axes match?2012-05-01
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    You should play a little with the "Y-Scale" button.2012-05-01
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    @Qiaochu Yuan I entered the equation in and told it to graph.2012-05-01
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    @CrewdNBasic I did too and it worked fine for me.2012-05-01
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    What PurpleMath gave was right. Check http://snipurl.com/23bm97v2012-05-01

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