Results 1 to 5 of 5

Math Help - Is the answer correct?

  1. #1
    Member
    Joined
    Jan 2011
    Posts
    104

    Is the answer correct?

    Is the answer correct?

    Question: Factorise 121 - (p+2)Square

    My answer: (p+13)(p-9)

    Don't know whether if it is (p+39)(p-3) or (p+13)(p-9 or maybe i am wrong
    Please check this for me
    Thanks a lot
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,621
    Thanks
    426
    Quote Originally Posted by FailInMaths View Post
    Is the answer correct?

    Question: Factorise 121 - (p+2)Square

    My answer: (p+13)(p-9)

    Don't know whether if it is (p+39)(p-3) or (p+13)(p-9 or maybe i am wrong
    Please check this for me
    Thanks a lot
    11^2 - (p+2)^2 = [11 - (p+2)][11 + (p+2)] = (9-p)(13+p)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2011
    Posts
    7
    The answer is (9-p)(13-p).
    Remember the difference of 2 squares formula.
    That a2-b2=(a+b)(a-b)

    P.S. @skeeter how do you type the square of the numeral.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,406
    Thanks
    1294
    In math tags you type ^{}, e.g. 3^{25} gives \displaystyle 3^{25}.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Senior Member bugatti79's Avatar
    Joined
    Jul 2010
    Posts
    461
    Quote Originally Posted by Calye View Post
    The answer is (9-p)(13-p).
    Remember the difference of 2 squares formula.
    That a2-b2=(a+b)(a-b)

    P.S. @skeeter how do you type the square of the numeral.
    Double click on the equation and you will see the code required to write. To answer your question... x to be squared would be (double click to see the code)

    x^2
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 15
    Last Post: July 29th 2011, 01:39 AM
  2. Have I gotten to the correct answer?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 2nd 2010, 08:07 PM
  3. Replies: 1
    Last Post: October 4th 2010, 04:46 PM
  4. Is my answer correct?
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 18th 2010, 05:50 AM
  5. I think I have the correct answer...
    Posted in the Algebra Forum
    Replies: 1
    Last Post: December 6th 2008, 08:53 PM

/mathhelpforum @mathhelpforum