SOLUTION: Simplify p(p - q) - q(q - p).

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Question 1012403: Simplify
p(p - q) - q(q - p).
Found 2 solutions by Fombitz, fractalier:
Answer by Fombitz(32388) About Me  (Show Source):
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
p(p - q) - q(q - p) = p^2 - pq - q^2 + pq = p^2 - q^2