(7-х)(4х-1)(х+9) ≥ 0
7 - x = 0 => x = -7
4x - 1 = 0 => x = 1/4
x + 9 = 0 => x = -9
Ответ: [-7; -9 ] U [1/4; +∞)
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(7-х)(4х-1)(х+9) ≥ 0
7 - x = 0 => x = -7
4x - 1 = 0 => x = 1/4
x + 9 = 0 => x = -9
Ответ: [-7; -9 ] U [1/4; +∞)