Factoring a polynomial

  • Thread starter Ryuk1990
  • Start date
  • #1
158
0

Homework Statement



7X2(X - 2) - (X - 2)

2. The attempt at a solution

Ok, this is really simple but for some reason I can't figure out why the answer has to be (7X2 - 1)(X - 2)

The process is that I have to divide both parts by (X - 2). However, if I do that, I only get 7X2 - 1. Where does that (X - 2) come from for the final answer?
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,223
31


Homework Statement



7X2(X - 2) - (X - 2)

2. The attempt at a solution

Ok, this is really simple but for some reason I can't figure out why the answer has to be (7X2 - 1)(X - 2)

The process is that I have to divide both parts by (X - 2). However, if I do that, I only get 7X2 - 1. Where does that (X - 2) come from for the final answer?

you don't divide it, you factor it out.

you'll be left with

{x-2}{7x2(1)-1(1)}

understand?
 
  • #3
158
0


Ah yes yes yes. I see it now. Thanks. :-)
 

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