sedinalana

Verified answer

(4-4x+2+2x-1+x²)/(1+x)(1-x)<0
(x²-2x+5)/(1+x)(1-x)<0
x²-2x+5>0 при любом х,т.к.D<0⇒(1+x)(1-x)<0
x=1
x=-1
x∈(-∞;-1) U (1;∞)