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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?