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Verified answer
2x^2 + 4x - q = 0a = 2
b = 4
c = -q
syarat memiliki akar kembar
D = 0
b² - 4ac = 0
4² - 4(2)(-q) = 0
16 + 8q = 0
8q = -16
q = -16/8
q = -2