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!

Homework Help: Finding equation of a plane with 3 points

  1. Apr 19, 2014 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    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


    User Avatar
    2017 Award

    Staff: Mentor

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


    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)##
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted