testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Homework Help Forums
 Algebra
 Factoring
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

energy
Junior Member

USA
4 Posts

Posted - 10/18/2007 :  18:54:42  Show Profile  Reply with Quote
4m-49n

i am kind of stuck between 2 answers.can someone tell me which one is the right answer. Thank you!!

(4m-49n)(4m+49n) or (2m-7n)(2m+7n)
Go to Top of Page

peppers18
Advanced Member

Canada
124 Posts

Posted - 10/18/2007 :  19:20:32  Show Profile  Reply with Quote
try foiling each of them back together and see which one is right
Go to Top of Page

the_hill1962
Advanced Member

USA
1468 Posts

Posted - 10/19/2007 :  07:55:16  Show Profile  Reply with Quote
Performing FOIL on
(4m-49n)(4m+49n)
results in
First 4m4m = 16m
Outside 4m49n = 196mn
Inside -49n4m = -196mn
Last -49n49n = 2401n

Performing FOIL on
(2m-7n)(2m+7n)
results in
First 2m2m = 4m
Outside 2m7n = 14mn
Inside -7n2m = -14mn
Last -7n7n = -49n

Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.04 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2014 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 24 Nov 2014