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## Homework Statement

(2; 0; 1); (-1; 2; 3); (3; 2; 2) and (3;-6;-3)

## Homework Equations

PS→⋅(PR→×PQ→)=0

## The Attempt at a Solution

Hi all, I am just wondering if my calculations are correct, and in fact these points do not lie on a plane. My answer is = 50 and i am not confident. Can anyone help me please?

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