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Verified answer
Persamaan Kuadrat-x² - 6x + 7 = 0
(-x + 1)(x + 7) = 0
Pembuat nol :
-x + 1 = 0 ---> x = 1
x + 7 = 0 ---> x = -7
Pembuat nol :
x = 1 dan x = -7