Results 1 to 2 of 2

Math Help - grade 10 math problems

  1. #1
    Newbie
    Joined
    Feb 2008
    From
    florida
    Posts
    17

    grade 10 math problems

    I am having trouble factoring this problem:
    8x^3y^6 + 27

    I also want to know if I have factored correctly on this problem:
    a^3b^6 - b^3
    My answer to this question (ab^3-b)^3
    Am I right?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    8x^3 y^6 + 27
    (2x y^2)^3 + 3^3

    This is a Sum of two cubes and you should know.
    a^3 + b^3 = (a+b)(a^2-ab+b^2)

    and i guess your expected to use a^3 - b^3 = (a-b)(a^2+ab+b^2)

    for the second question.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Grade 12 Math Problems
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: October 17th 2010, 09:36 PM
  2. Grade 10 math Help
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 13th 2010, 07:16 PM
  3. Replies: 1
    Last Post: November 17th 2009, 05:55 PM
  4. 2 math problems 9th grade~~
    Posted in the Algebra Forum
    Replies: 6
    Last Post: July 16th 2009, 01:58 PM
  5. Grade 11 Math Problems
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 16th 2008, 10:32 AM

Search Tags


/mathhelpforum @mathhelpforum