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Homework Statement
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Hopefully this is in the correct section I looked around for others but this seemed like the right one.
Find the scalar, vector, and parametric equations of the plane that passes through the points P(1,0,4), Q(3,1,-6), and R(-2,3,5).
Homework Equations
The Attempt at a Solution
I found the vector and parametric equations but couldn't find the scalar equation. I eventually tried finding the cross product of two of the direction vectors and it gave me the correct answer for the scalar equation, except for D which I found by substituting in a point.
Could anyone explain why the cross product of two direction vectors gives me the scalar equation, or is this one of those things that I should just remember?