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y = 3x + 1
px² - 2x - 3x - 5 - 1 = 0
px² - 5x - 6 = 0
a = p, b = -5, c = -6
syarat D > 0
b² - 4ac > 0
(-5)² - 4.p.(-6) > 0
25 + 24p > 0
24p > -25
p =