ОДЗ: х≠1
(x-2)²(x+4)(1-x)≥0
-(x-2)²(x+4)(x-1)≥0
(x-2)²(x+4)(x-1)≤0
x=2 x=-4 x=1
+ - + +
--------- -4 --------------- 1 ------------- 2 --------------
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x∈(-∞; -4) x= -5 + - - | +
x∈(-4; 1) x=0 + + - | -
x∈(1; 2) x=1.5 + + + | +
x∈(2; +∞) x=3 + + + | +
x∈[ -4; 1)U{2}
Ответ: [-4; 1)U{2}.