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B.A = ||A||
(1.2 + 1.2√2 + √2.p) = √(1² + 1² + √2²)
2 + 2√2 + p√2 = 2
p√2 = -2√2
p = -2
B.C = 0
2.0 + 2√2.q + -2.√2 = 0
2√2q - 2√2 = 0
2√2q = 2√2
q = 1
p + q = -2 + 1
= -1