- #1
cris623
- 9
- 0
Homework Statement
Find the equation of the plane which contains the points (−3 −1 3), (−5 −4 2) and (−6 0 0).
Write the equation in the form Ax+By+Cz=D
Homework Equations
none
The Attempt at a Solution
P (-3 -1 3)
Q (-5 -4 2)
R (-6 0 0)
Alright so first i found the vectors PQ and PR to be (-2 -3 -1) and (-3 1 -3)
Then I found the cross product PQ x PR to be (8 -3 -11) and put that into the equation to get 8x-3y-11z=D
and then subbed point P into that equation to solve for D and finished with:
8x-3y-11z=-54
This answer was marked wrong, I've checked everything over and over and can't figure out how to do it.