- #1
Blackh4wk
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Homework Statement
Find the Cartesian Eqationn of the plane containing the points (0,-2,6), (1,8,-2) and (2,0,5).
Homework Equations
The Attempt at a Solution
→
OA = 0,-2,6
→
AB = 1,10,8
→
AC = 2,2,-1
Cross product of AB AC = 6,-15,-18
X - 0 * 6
Y - (-2) * -15
Z - 6 * -18
Which becomes,
6x - 15y + 30 - 18z + 108 = 0
Clean it up
6x - 15y - 18z = -138
Proper answer is
2x - 5y - 6z = -26
Now, I know how you get the LHS to = the proper answer (divide by 3), but how do I go about getting the RHS to equate properly?
Or have I screwed up some of my arithmetic?