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(x + 4)(x - 4) = 0
x = - 4 atau x = 4
2. (x - 5)² = 81
(x - 5) = +- 9
x - 5 = 9 atau x - 5 = - 9
x = 14 x = - 4
3. (x - 4)² = 144
(x - 4) = +- 12
x - 4 = 12 atau x - 4 = - 12
x = 16 x = - 8