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grass975

Каждая из скобок равна 0. Тогда (х-3)(х+3)=0 и х^2+2×х-3=0. Отсюда х=3, х=-3, и решение квадратного уравнения: дискриминант равен 16, х=-3, х=1. Тогда ответ: х=3, х=-3, х=1.

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