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y = 6x - 2 ......2
substitusikan 1 ke 2
x² + 2x + 1 = 6x - 2
x² + 2x - 6x + 1 + 2 = 0
x² - 4x + 3 = 0
(x - 1)(x - 3) = 0
x - 1 = 0 atau x - 3 = 0
x = 1 atau x = 3
untuk x = 1
y = 6x - 2 = 6.1 - 2 = 4 ===> (1,4)
untuk x = 3
y = 6x - 2 = 6.3 -2 = 16 ===> (3,16)
HP = {(1,4),(3,16)}