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: Find cartesian equations of the line of intersection of the planes

  1. May 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Find cartesian equations of the line of intersection of the planes x+3y-6z =2 and 2x+7y-3z=7

    3. The attempt at a solution
    What I did first was I cross product the 2 equation and then I got 33i-9j+k
    Then I took both of the equation and let y = 0. After that my answer seems to be weird.. Did I did anything wrong? The answer of the book was given ∴x+7/33 = y-3/-9 = z
     
  2. jcsd
  3. May 15, 2012 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    What do you mean by weird? In any case, your method, at least to me, seems to be a bit of overkill. Why not just solve the system of equations the usual way?
     
  4. May 15, 2012 #3
    Never mind. I managed to solve it. Thank you for the reply :)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook