Results 1 to 6 of 6

Math Help - factorise

  1. #1
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897

    factorise

    hi this is my question:
    i need to factorise, x^2-8x+12=?
    i know it has two brackes and they both start with x but im not sure how to find out the numbers in side the brackets? how would i do this??
    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Oct 2009
    Posts
    769
    Quote Originally Posted by andyboy179 View Post
    hi this is my question:
    i need to factorise, x^2-8x+12=?
    i know it has two brackes and they both start with x but im not sure how to find out the numbers in side the brackets? how would i do this??
    Thanks!
    Have you looked at -2 and -6 (also have you learned about the discriminant)?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897
    i don't think we have learnt about discrininant. if i do the -2 and -6 what would that make because i think i have to make 8.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Banned
    Joined
    Oct 2009
    Posts
    769
    Quote Originally Posted by andyboy179 View Post
    i don't think we have learnt about discrininant. if i do the -2 and -6 what would that make because i think i have to make 8.
    Your problem shows -8, not 8 so what happens when you add -2 with -6?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897
    oh ye, sorry i read it wrong! Thnakyou very much!
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Banned
    Joined
    Oct 2009
    Posts
    769
    You're welcomed (you can do yourself a favor by reading up on the discriminant).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Factorise.
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 26th 2011, 04:07 AM
  2. Factorise
    Posted in the Algebra Forum
    Replies: 3
    Last Post: April 11th 2010, 10:48 PM
  3. factorise
    Posted in the Algebra Forum
    Replies: 2
    Last Post: February 25th 2010, 01:27 AM
  4. should this factorise?
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: February 15th 2010, 10:14 PM
  5. Factorise :/
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 6th 2010, 12:01 PM

Search Tags


/mathhelpforum @mathhelpforum