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dimana a+b = -b/a dan a×b = c/a
a+b = -(-4)/2 = 2
a×b = c/a = 3/2
x² - (2a+2b-2)x + (4ab - 2a - 2b + 1) = 0
x² - (2(a+b) - 2)x + (4ab - 2(a+b) + 1) = 0
x² - (2(2) - 2)x + (4(3/2) - 2(2) + 1) = 0
x² - 2x + 3 = 0