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3/18/2013 11:23:38 PM
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does somebody want to help me with my algebra homework?
im trying to do the rational zero theorem. I cant figure it out. I tried googling it, but I came out empty handed and still not knowing of what to do.
heres an example: f(x)=x^3-14x^2-14x-8
I have to find all possible rational zeros
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I think you can only use synthetic division or a graphing calculator since it has no GCF, grouping doesn't work, etc.
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Jack I'm going to tell you the 2 biggest secrets to passing all math classes: 1). the Youtuber: PatrickJMt He's a math teacher who makes great YouTube videos on just about every topic in math. Search in youtube what youre learnign then add his anme and surely you will find the best tutorial. he is better than an actual teacher. 2). Wolframalpha.com Its a computational search engine that pretty much solves all your math problems. enter in your function/problem and type in what you need (zero's etc). and it will solve it for you. While its good to learn math by practice i only use Wolframalpha for the problems i know hwo to solve but are very tedious. with these 2 things you can learn any math topic and complete any math homework you have in the future. These things helped me learn calculus and is currently helping me in multi-variable calculus. they are great tools.
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4 RepliesMake sure you set it equal to 0 x^3-14x^2-14x-8=0 Now, normally, you would try to factor it out. I'll save you the trouble and tell you that you really can't. What you need is to find one of the zeros by either using a graphing calculator, or a long, obnoxious process of trying out the numbers 8; 4; 2; or 1 in synthetic division, and testing to see you get a remainder of zero. Let me know when you find out which one of those work.
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1 ReplyI'm only in calculus :/ Sorry, your math baffles me.
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2 Replies[quote] rational zeros[/quote]erm, are those like "real roots"?
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1 ReplyDo your own homework, asswipe.
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4 RepliesYou tell your teacher the only practical use for such a thing is in theoretical sciences and teaching.
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[url=http://www.sparknotes.com/math/algebra2/polynomials/section4.rhtml]This[/url] looks straightforward, if you missed it. There is a general form for solving cubic equations, but it's pretty nasty.
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there you go.
