(6-x)(3x+5)меньше или равно 0
(6-x)(3x+5)≤0 -(x-6)* 3(x + ⁵/₃)≤0 (x-6)(x + 1 ²/₃)≤0 x=6 x= -1 ²/₃ + - + --------- -1 ²/₃ ------------- 6 --------------- \\\\\\\\\\\\\\\\\\\\\\ x∈[-1 ²/₃; 6] Ответ: [-1 ²/₃; 6]