My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
June 21st, 2012, 06:43 AM   #1
Member
 
Joined: Sep 2011

Posts: 49
Thanks: 0

factorize the following expressions:

3ad^2 +2b + a + 6bd^2
I suppose it should look like that:

a(3d^2+1) + 2b(3d^2+1) is that all?


Second one:
12p^2+13p - 4 ???????
luketapis is offline  
 
June 21st, 2012, 06:58 AM   #2
Global Moderator
 
The Chaz's Avatar
 
Joined: Nov 2009
From: Northwest Arkansas

Posts: 2,766
Thanks: 4

Re: factorize the following expressions:

Quote:
Originally Posted by luketapis
3ad^2 +2b + a + 6bd^2
I suppose it should look like that:

a(3d^2+1) + 2b(3d^2+1) is that all?
From here, take out the common factor of 3d^2+1...
(3d^2+1)(a+2b)
The Chaz is offline  
June 21st, 2012, 07:19 AM   #3
Member
 
Joined: Sep 2011

Posts: 49
Thanks: 0

Re: factorize the following expressions:

thx
luketapis is offline  
June 21st, 2012, 07:26 AM   #4
Math Team
 
Joined: Oct 2011
From: Ottawa Ontario, Canada

Posts: 10,144
Thanks: 685

Re: factorize the following expressions:

Quote:
Originally Posted by luketapis
Second one:
12p^2+13p - 4 ???????
Use quadratic formula; you'll get:
(3p + 4)(4p - 1)
Denis is offline  
June 21st, 2012, 08:14 AM   #5
Senior Member
 
MarkFL's Avatar
 
Joined: Jul 2010
From: St. Augustine, FL., U.S.A.'s oldest city

Posts: 12,155
Thanks: 462

Math Focus: Calculus/ODEs
Re: factorize the following expressions:

For the second one, another approach:



The product of the first and last coefficients is:



We want two factors of -48 whose sum is the middle coefficient of 13, and those are -3, and 16. Since 12 is divisible by 3 and 4, we can get our -3 from 3(-1) and our 16 from 4(4), so we have:

MarkFL is offline  
June 21st, 2012, 09:07 AM   #6
Member
 
Joined: Sep 2011

Posts: 49
Thanks: 0

Re: factorize the following expressions:

thx
luketapis is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
expressions, factorize



Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can someone factorize this for me? ThatAnonKid Elementary Math 4 February 8th, 2012 02:24 AM
Factorize into irreducibles. Jose3 Abstract Algebra 7 December 16th, 2011 01:19 AM
factorize fantom.1040 Algebra 6 July 16th, 2011 11:31 PM
factorize naserellid Algebra 14 August 17th, 2010 10:33 AM
factorize salamatr25 Algebra 12 August 6th, 2010 05:41 PM





Copyright © 2017 My Math Forum. All rights reserved.