X2 4x 30 0. 4x2+4x+1/x2-4 4x+2/6x-12. ((-X+1)^-1 - ((-X+4)^-1)^2 =<|X^2+6x|/. 2x-1/6-3x +2x+1/2x-4 -x+3/6x-12. X-4/X-2-X/2-X. (X+1)(X+3)^2/X+4<=0. (X-5)^2. X-2=√2x-5. 4x-2,5=x+5. X 2 4 X 15 0. X2-2x-15=0. X^2+3x-4/x^2+x-30>0. 7x+2x. Х-2/5-4х-1/20 2х-5/4