Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » alt.algebra.help.independent

Topic: Factor [(y-1)^4] - (y-1)^2
Replies: 2   Last Post: Apr 18, 2009 6:22 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
CS

Posts: 1
From: Montreal, Quebec
Registered: 4/6/09
Factor [(y-1)^4] - (y-1)^2
Posted: Apr 6, 2009 8:34 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I just started studying algebra recently and can't factor this one problem correctly:
[(y-1)^4] - (y-1)^2
The answer from the back of the book is y[(y-1)^2](y-2).

But, I can't get it.
I know (y-1)^2 = [y^2]-2y+1, which helps to a point.
I get as far as [y^4]-[4y^3]+[5y^2]-2y and can't seem to really factor any further.
By the way, I added all square brackets just to avoid confusion with the exponents. There are none in the equation.

Hope you can help!



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.