Results 1 to 2 of 2

Math Help - expanding brackets

  1. #1
    Newbie
    Joined
    Aug 2008
    Posts
    19

    expanding brackets

    An easy one, but still...

    The problem is expanding (((2+h)^2)-4)/h

    first off do I need all those brackets to be clear when it's written on one line?

    How do you get to the answer of 4h+(h^2)/h? I don't get that...

    Could you explain where I'm going wrong?

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Dec 2008
    Posts
    52
    Quote Originally Posted by newbie2008 View Post
    An easy one, but still...

    The problem is expanding (((2+h)^2)-4)/h

    first off do I need all those brackets to be clear when it's written on one line?

    How do you get to the answer of 4h+(h^2)/h? I don't get that...

    Could you explain where I'm going wrong?

    Thanks
    for the expansion, \frac {(2+h)^2-4}{h} you need to first square (2+h) which is just h^2 + 4h + 4 (if you need more explanation for this please reply and say so), then you are subtracting 4 so you are left with h^2 + 4h.

    you can still make this answer simpler if you want by dividing it:

    \frac {4h+h^2}{h} you are dividing by h and so 4h/h is just 4, and h^2/h is just h, so your final answer is h + 4
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Help: Expanding Brackets
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 29th 2010, 10:38 AM
  2. expanding brackets
    Posted in the Algebra Forum
    Replies: 6
    Last Post: February 27th 2010, 04:51 AM
  3. expanding brackets
    Posted in the Math Topics Forum
    Replies: 7
    Last Post: January 18th 2010, 02:31 PM
  4. expanding brackets
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 19th 2008, 04:38 PM
  5. Expanding brackets
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: April 29th 2008, 01:04 PM

Search Tags


/mathhelpforum @mathhelpforum