1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding equation of a plane with 3 points

  1. Apr 19, 2014 #1
    1. The problem statement, all variables and given/known data
    attachment.php?attachmentid=68806&stc=1&d=1397897233.png


    2. Relevant equations
    N/A


    3. The attempt at a solution
    attachment.php?attachmentid=68807&stc=1&d=1397897233.jpg

    The problem is that I dont get the right answer which is:
    2x + y + 7z = -3.

    Can you please help me find where I went wrong?
     

    Attached Files:

  2. jcsd
  3. Apr 19, 2014 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Can you explain what you calculated there?
     
  4. Apr 19, 2014 #3

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    You calculated the cross-product incorrectly.

    ##\left( -2 + 0 \right)\hat i \ne 0\hat i ##

    ##\hat k \left( \ (1) (-3) - (-2)(-2)\ \right)\ne \hat k \left(-3 + 4 \right)##
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted