Results 1 to 2 of 2

Thread: difference of squares

  1. #1
    Member
    Joined
    Feb 2009
    Posts
    101
    Awards
    1

    difference of squares

    factorise using difference of squares

    (a)$\displaystyle x^2$ -25

    do i use $\displaystyle a^2$-2ab+$\displaystyle b^2$

    (b) 9$\displaystyle p^2$-4$\displaystyle
    q^2
    $

    do i use
    and $\displaystyle a^2$$\displaystyle -b^2$
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor alexmahone's Avatar
    Joined
    Oct 2008
    Posts
    1,111
    Thanks
    7
    Quote Originally Posted by decoy808 View Post
    factorise using difference of squares

    (a)$\displaystyle x^2$ -25

    do i use $\displaystyle a^2$-2ab+$\displaystyle b^2$

    (b) 9$\displaystyle p^2$-4$\displaystyle
    q^2
    $

    do i use
    and $\displaystyle a^2$$\displaystyle -b^2$
    $\displaystyle a^2-b^2=(a+b)(a-b)$

    a) $\displaystyle x^2-25=x^2-5^2=(x+5)(x-5)$

    b) $\displaystyle 9p^2-4q^2=(3p)^2-(2q)^2=(3p+2q)(3p-2q)$
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Difference of Squares
    Posted in the Algebra Forum
    Replies: 1
    Last Post: Mar 31st 2011, 04:49 PM
  2. Difference of squares
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: Mar 31st 2010, 10:41 AM
  3. Ti-83 difference of squares
    Posted in the Calculators Forum
    Replies: 4
    Last Post: Aug 4th 2009, 09:52 PM
  4. Difference of Squares
    Posted in the Algebra Forum
    Replies: 9
    Last Post: Aug 25th 2008, 09:28 AM
  5. The difference of two squares
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: Aug 8th 2008, 11:59 AM

Search Tags


/mathhelpforum @mathhelpforum