初二解不等式和分式方程

题目

初二解不等式和分式方程
2/(X-1)+2≥-X (X-4)/1=(X²-16)/4

答案

(X-4)/1=(-16)/4
4X-16=X²-16
X=4&X=0
2/(X-1)+2≥-X
2/(X-1)≥-X-2
X+2≥-2/(X-1)
(X+2)*(X-1)≥-2
X²+X-2≥-2
X(X+1)≥0
X≥0&x≤-1