(x-2)²>5
x-2＞√5或x-2＜-√5;
x＞2+√5或x＜2-√5;
(x+1)²≤0
x+1=0;
x=-1;
(x-4)²＞0
x≠4;
6x²+5x-4＜0
6(x²+5x/6+25/144)-4-25/24＜0;
6(x+5/12)²＜121/24;
(x+5/12)²＜121/144;
-11/12＜x+5/12＜11/12
-4/3＜x＜1/2;
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