Results 1 to 4 of 4

Math Help - is this correct

  1. #1
    Newbie
    Joined
    May 2007
    Posts
    10

    is this correct

    5x + (3x)^2 for x=-2

    5* 3+ (3*2) ^2
    15 + (6) ^2
    15+36
    51
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by breanna2471 View Post
    5x + (3x)^2 for x=-2

    5* 3+ (3*2) ^2
    15 + (6) ^2
    15+36
    51
    no it isn't, x = -2, you plugged in x = 3 for 5x
    Follow Math Help Forum on Facebook and Google+

  3. #3
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by breanna2471 View Post
    5x + (3x)^2 for x=-2

    5* 3+ (3*2) ^2
    15 + (6) ^2
    15+36
    51
    ok, we have 5x + (3x)^2 and we want to evaluate it when x = -2. this simply means that we replace x with -2 wherever we see it in the formula.

    5x + (3x)^2 = 5(-2) + (3*-2)^2
    .................= -10 + (-6)^2
    .................= -10 + 36
    .................= 26
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    May 2007
    Posts
    10

    thank you

    you have been very helpful i really appreciate your help
    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. Is this correct ?
    Posted in the Calculus Forum
    Replies: 3
    Last Post: July 16th 2010, 12:24 PM
  3. is this correct?
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: April 24th 2009, 10:34 AM
  4. Is this correct
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: March 17th 2009, 05:43 AM
  5. is this correct?
    Posted in the Calculus Forum
    Replies: 2
    Last Post: July 1st 2008, 11:00 PM

Search Tags


/mathhelpforum @mathhelpforum