143.
(x+4)(x−5)<0(x+4)(x−5)<0
(x+2)(x−6)≤0(x+2)(x−6)≤0
x2≥0x2≥0
x2<0x2<0
(x−3)2≤0(x−3)2≤0
(x−2)2>0(x−2)2>0