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a. tipot sb.x ==> y = 0
2x² - 5x - 12 = 0
(2x + 3)(x - 4) = 0
x = atau x = 4
tipot (, 0) dan (4, 0)
b. tipot sb y ==> x = 0
y = (0,c) ===> (0,-12)
c.
d.
mohon koreksi lagi.. :)