Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

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

Math Forum » Discussions » Math Topics » alt.math.undergrad.independent

Topic: how do you factor this?
Replies: 3   Last Post: Oct 15, 2012 6:41 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
justlooking for someone else

Posts: 77
Registered: 12/10/04
Re: how do you factor this?
Posted: Oct 11, 2012 11:38 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

beautiful. thanks so much for your reply and especially your time. my
daughter will like it. appreciated.


On Thu, 11 Oct 2012 15:03:13 -0700 (PDT), jdmgt <jguerra000@yahoo.com>

>On Oct 11, 12:01 pm, stoneboy <x...@x.com> wrote:
>> Hi, I am teaching my daughter how to factor equations and came across
>> an expression  in a worksheet that looks like below:
>> 1+a+b+c+ab+bc+ca+abc
>> The answer given (no work shown) shows (a+1)(b+1)(c+1) would be the
>> factors.  Sure enough, when I multiply all those terms, eventually, I
>> get the above result.  How do I go about deciphering how to group and
>> factor the original equation above.  Kinda confused.  I was able to
>> group them and factor somewhat, but could not get it down to the
>> answer that is listed.  Please help.
>> Thanks
>> s

>Let's form 4 groups: a+1 + ab+b + ac+c + bc+abc = (a+1)+b(a+1)+c(a
>+1)+bc(a+1)= (a+1)(1+b+c+bc)=(a+1)[b+1 +c(b+1)]
>Finally: (a+1)(b+1)(c+1)

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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2016. All Rights Reserved.