2. Решите неравенство методом интервалов:

а) (х –12)(х + 11) < 0

б) (х + 1,7)(х – 9)(4,2 + х) < 0

в) (6х + 1)(х – 14) < 0

г) (2х – 3)(х + 4) > 0
помогите пож
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