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Math Help - Divism

  1. #1
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    Divism

    hi, i need to divide x^3+9x^2+20x+12 by X+6. I can do long div with numbers, but i struggle to do it with equations, could any one please do it step by step and explain the steps pls? thank you
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by Chez_ View Post
    hi, i need to divide x^3+9x^2+20x+12 by X+6. I can do long div with numbers, but i struggle to do it with equations, could any one please do it step by step and explain the steps pls? thank you
    Something like this is hard to explain. If you have msn messenger, send me a private message and I'll see if i can explain to you using that.
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  3. #3
    Math Engineering Student
    Krizalid's Avatar
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    Quote Originally Posted by Chez_ View Post
    hi, i need to divide x^3+9x^2+20x+12 by X+6.
    This is painful, but let's do it.

    <br />
\noindent\begin{array}{*{20}c}~~~\,x^3&+~~\,9x^2&+  ~~\,20x&+~~\,12&\div&\left|\!{\underline{\,{x\,+\,  6}\,}}\right.&=&x^2\,+\,3x\,+\,2.\\<br />
-~\,x^3&-~~\,6x^2&\\\cline{0-1}<br />
&~~~\,~\,3x^2&+~~\,20x&\\<br />
&-\;\;\;3x^2&-\,~\,\,18x&\\\cline{2-3}<br />
&&~~~~\;\;\,\,2x&+~~\,12&\\<br />
&&-~~\;\;\,2x&-~~\,12&\\\cline{3-4}<br />
\end{array}<br />


    And we're done
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