Results 1 to 14 of 14

Math Help - a friend asked me this

  1. #1
    Newbie
    Joined
    May 2007
    Posts
    2

    a friend asked me this

    hello, a friend asked me this and I don't know if my answer is correct. the prob is [ 3 - (-2)] [ 3 + l -2 l] and answer is 25. pls tell me if I'm way wrong or not.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,857
    Thanks
    321
    Awards
    1
    Quote Originally Posted by rsason View Post
    hello, a friend asked me this and I don't know if my answer is correct. the prob is [ 3 - (-2)] [ 3 + l -2 l] and answer is 25. pls tell me if I'm way wrong or not.
    [3 - (-2)][3 +|-2|]

    = [3 + 2][3 + |-2|] <-- -(-2) = 2

    = [5][3 + 2] <-- |-2| = 2

    = [5][5]

    = 25

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    May 2007
    Posts
    2

    Smile re: a friend asked....

    Thank you so much for a very speedy reply/assistance.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Topsquark is a Physics Maestro which means that he is Master of light which means that he can post replies faster than a speed of light!
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by OReilly View Post
    Topsquark is a Physics Maestro which means that he is Master of light which means that he can post replies faster than a speed of light!
    Superluminal velocities are only an optical illusions, and no information is
    transfered at that speed.

    RonL
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by CaptainBlack View Post
    Superluminal velocities are only an optical illusions, and no information is
    transfered at that speed.

    RonL
    Which means that universe doesn't exist?
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,857
    Thanks
    321
    Awards
    1
    Quote Originally Posted by OReilly View Post
    Topsquark is a Physics Maestro which means that he is Master of light which means that he can post replies faster than a speed of light!
    Quote Originally Posted by CaptainBlack View Post
    Superluminal velocities are only an optical illusions, and no information is
    transfered at that speed.

    RonL
    Well, I am made of tachyons, after all.

    -Dan
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Newbie
    Joined
    May 2007
    Posts
    12
    You're right. The two negatives multiplied together make a positive, and the absolute value makes the -2 a positive also.
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by topsquark View Post
    Well, I am made of tachyons, after all.

    -Dan

    Tachy

    RonL
    Follow Math Help Forum on Facebook and Google+

  10. #10
    Member
    Joined
    Nov 2006
    Posts
    136
    Follow Math Help Forum on Facebook and Google+

  11. #11
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,857
    Thanks
    321
    Awards
    1
    Quote Originally Posted by chogo View Post
    The key word here being "apparent." (Though I'm still "akid" myself.)

    -Dan
    Follow Math Help Forum on Facebook and Google+

  12. #12
    Senior Member ecMathGeek's Avatar
    Joined
    Mar 2007
    Posts
    436
    Quote Originally Posted by topsquark View Post
    The key word here being "apparent." (Though I'm still "akid" myself.)

    -Dan
    "akkid"?
    Follow Math Help Forum on Facebook and Google+

  13. #13
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,857
    Thanks
    321
    Awards
    1
    Quote Originally Posted by topsquark View Post
    The key word here being "apparent." (Though I'm still "akid" myself.)

    -Dan
    Quote Originally Posted by ecMathGeek View Post
    "akkid"?
    "apparent" ==> "a parent"
    "akid" ==> "a kid"

    -Dan
    Follow Math Help Forum on Facebook and Google+

  14. #14
    Junior Member
    Joined
    Mar 2008
    Posts
    27
    [ 3 - (-2)] [ 3 + l -2 l]

    = [3+2][3+2] : Remember l -2 l = 2
    = [5][5]
    =25
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. A proof my friend got me to do
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: March 20th 2011, 06:06 PM
  2. Help for a friend
    Posted in the Calculus Forum
    Replies: 1
    Last Post: September 13th 2009, 01:31 PM
  3. What is being asked?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 30th 2009, 11:22 AM
  4. Helping my friend
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: March 14th 2009, 11:21 AM
  5. oh friend please help me I beg you.!
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 13th 2008, 10:15 PM

Search Tags


/mathhelpforum @mathhelpforum