Discussion
| (A) | x +1 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 03/16/2012 21:13
Can someone please refresh me on this
Posted: 03/16/2012 22:10
Hi Lindsay. Thanks for using the app. Here's a refresher:
1) From algebra, we recognize the numerator is a square of (x-1), i.e., if you multiply x-1 by itself, you get x^2-x-x+1 = x^2 -2x +1. So the numerator can be rewritten as (x-1)(x-1)
2) (x-1) in the numerator and x-1 in the denominator cancel out, and you get the answer, which is ...
If you found this useful, please rate us nicely in the App Store. Thanks.
1) From algebra, we recognize the numerator is a square of (x-1), i.e., if you multiply x-1 by itself, you get x^2-x-x+1 = x^2 -2x +1. So the numerator can be rewritten as (x-1)(x-1)
2) (x-1) in the numerator and x-1 in the denominator cancel out, and you get the answer, which is ...
If you found this useful, please rate us nicely in the App Store. Thanks.
Posted: 02/09/2013 15:46
Hi Joel, I'll give you a good rating - the app is great in itself, then in addition to that: you guys; patient, personal and to the point. Thanks for making studying for the GRE even more fun.
Posted: 07/02/2013 08:36
Please I do not understand how we arrive at x-1 as de answer. I got the answer because I only assumed which was a total guess work. If I can get an explanation of how the answer is obtained will be much appreciated. Thanks - Ibiye
Posted: 07/02/2013 12:19
Hi Iblye,
To factor the expression x^2 - 2x + 1, we have to find factors of 1 whose sum or difference is -2. Now, (-1) + (-1) = -2. So, the expression factors into (x - 1)(x - 1). One of these identical factors cancels with the x - 1 in the bottom of the fraction, which leaves just x - 1 on the top.
Nova Press
To factor the expression x^2 - 2x + 1, we have to find factors of 1 whose sum or difference is -2. Now, (-1) + (-1) = -2. So, the expression factors into (x - 1)(x - 1). One of these identical factors cancels with the x - 1 in the bottom of the fraction, which leaves just x - 1 on the top.
Nova Press