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0 = x^2 - 3x - 4
0= (x-4)(x+1)
maka ( 4,0) , (-1,0)
titik potong sumbu y maka x = 0
y = -4
maka ( 0,-4)
y = x² - 3x - 4
0 = (x - 4) (x + 1)
x1 = 4
x2 = -1
Titik potong sumbu Y = (4,0) dan (-1,0)
Titik potong sumbu X ketika X = 0
y = x² - 3x - 4
y = 0 - 0 - 4
y = - 4
Titik potong sumbu X = (0, - 4)
Semoga membantu :)