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y² = -4x
(-5x-7)² = -4x
25x²+70x+49 = -4x
25x²+74x+49 = 0
(25x+49)(x+1) = 0
25x = -49 atau x = -1
x = -49/25
y = -5(-49/25)-7 = 49/5-35/5 = 14/5
atau
y = -5(-1)-7 = 5-7 = -2
Hp = {(-49/25,14/5),(-1,-2)}
semoga membantu ya :)