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Bab FungsiMatematika SMP Kelas VIII
f(x) = 0
x² + 2x - 8 = 0
x² - 2x + 4x - 8 = 0
(x + 4) (x - 2) = 0
x + 4 = 0
x = -4
x - 2 = 0
x = 2
pembuat nol fungsi, x = 2 atau x = -4