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p + q = -b/a = -6/3 = -2
p x q = c/a = 2/3
Sehingga,
p² + q² = (p+q)² - 2pq
= (-2)² - 2(2/3)
= 4 - 4/3
= 8/3
q = -1 - √
p^ + q^ = (√ - 1)^ + (-1 - √)^
= 11 + (-11)
= 0