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y = 4x - 5
Penyelesaian
cari x
x² - 2x + 4 = 4x - 5
x² - 2x - 4x + 4 + 5 = 0
x² - 6x + 9 = 0
(x - 3) (x - 3) = 0
x = 3
cari y
y = 4x - 5
y = 4(3) - 5
y = 12 - 5
y = 7
HP = {(3,7)}