Practice question
Question
If the system of equations px - 2y - pz = 0, 2x + py - pz = 0, -px + py + 2z = 0 has a non-trivial solution, then the sum of the possible values of p is
Explanation
In easy words, we verify 0 by full calculation: use standard identity, substitute, simplify step by step to reach 0.
Discussion
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