Thread: Divism

1. 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

2. Originally Posted by Chez_
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.

3. Originally Posted by Chez_
hi, i need to divide x^3+9x^2+20x+12 by X+6.
This is painful, but let's do it.

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

And we're done