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4log (x-3) + 4log (x+3) ≥ 2
4log ((x-3)(x+3)) ≥ 2
4log ((x-3)(x+3)) ≥ 2 . 4log4
(x-3)(x+3) ≥ 2 . 4
x^2 -9 ≥ 8
x^2 ≥ 8+9
x^2 ≥ 17
x ≥ √17