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Verified answer
Y=x² - 2x ...(i)y=-½ x² + 4x - 6 ...(ii)
Subtitusikan (i) dan (ii)
x² - 2x = -½ x² + 4x - 6
x² + ½ x ² - 2x - 4x + 6=0
3/2 x² - 6x + 6=0 (kali 2)
3x² - 12x + 12=0 (:3)
x² - 4x + 4=0
(x-2)²=0
x-2=0
x=2 ...(iii)
Subtitusi (iii) ke (i)
y=x² - 2x
y=2² -2(2)
y=0
HP:{2,0}