Results 1 to 5 of 5

Math Help - please help me to understand this?

  1. #1
    Newbie
    Joined
    Jun 2012
    From
    san diego
    Posts
    14

    please help me to understand this?

    Find each function value.f(x)=2-x2

    (a) f (28) =

    (b) f (8) =

    (c) f (-6) =

    (d) f (0.3) =
    Last edited by impressu2; November 5th 2012 at 09:53 AM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    fkf
    fkf is offline
    Junior Member fkf's Avatar
    Joined
    Nov 2012
    From
    Sweden
    Posts
    70
    Thanks
    9

    Re: please help me to understand this?

    I'll help you with the first one and hopefully you'll have the idea.

    Find each function value.f(x)=2-x^2
    (a) f (28)
    f(x)=2-x2 => f(28) = 2-(28)^2 = -782
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2012
    From
    san diego
    Posts
    14

    Re: please help me to understand this?

    I am able to solve them all except -6, I keep getting -38 and it says that it's incorrect.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member
    Joined
    Sep 2012
    From
    Sweden
    Posts
    250
    Thanks
    6

    Re: please help me to understand this?

    Quote Originally Posted by impressu2 View Post
    I am able to solve them all except -6, I keep getting -38 and it says that it's incorrect.
    2-x^2 if we put -6 insted of x we get
    2-(-6)^2 and we know that -6^2 = 36
    2-36 = -34 so the answer shall be -34
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Jun 2012
    From
    san diego
    Posts
    14

    Re: please help me to understand this?

    Thank you for the help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. I just do not understand this help please
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: June 3rd 2012, 04:14 PM
  2. I Need Help to Understand This
    Posted in the Advanced Applied Math Forum
    Replies: 4
    Last Post: November 27th 2011, 08:03 PM
  3. Replies: 0
    Last Post: February 27th 2010, 11:57 AM
  4. P&C qns: Please help me understand
    Posted in the Statistics Forum
    Replies: 3
    Last Post: February 20th 2008, 03:31 AM
  5. I don't understand
    Posted in the Geometry Forum
    Replies: 1
    Last Post: December 10th 2007, 01:51 PM

Search Tags


/mathhelpforum @mathhelpforum