2/(Х^2+10Х+25)-10/(25-Х^2)-1/(Х+5)
2/(х+5)^2-10/(х+5)*(х-5)-1/(х+5)=0
2*(х-5)*(х+5)-10(х+5)- 1(х+5)*(х-5)=0
(х+5)(х+5)(х-5)
2х^2-50-10x-50-x^2+25 =0
x^2-10x-75=0 (х+5)(х+5)(х-5) не равно 0
Д=100+4*75=400
х1=(10+20)\2=15
х2=(10-20)\2=-5
х2=-5 не удовлетворяет условию
ответ х=15
2/(Х^2+10Х+25)-10/(25-Х^2)-1/(Х+5)2/(х+5)^2-10/(х+5)*(х-5)-1/(х+5)=02*(х-5)*(х+5)-10(х+5)- 1(х+5)*(х-5)=0(х+5)(х+5)(х-5)2х^2-50-10x-50-x^2+25 =0(х+5)(х+5)(х-5)x^2-10x-75=0 (х+5)(х+5)(х-5) не равно 0Д=100+4*75=400х1=(10+20)\2=15х2=(10-20)\2=-5
х=15
2/(Х^2+10Х+25)-10/(25-Х^2)-1/(Х+5)
2/(х+5)^2-10/(х+5)*(х-5)-1/(х+5)=0
2*(х-5)*(х+5)-10(х+5)- 1(х+5)*(х-5)=0
(х+5)(х+5)(х-5)
2х^2-50-10x-50-x^2+25 =0
(х+5)(х+5)(х-5)
x^2-10x-75=0 (х+5)(х+5)(х-5) не равно 0
Д=100+4*75=400
х1=(10+20)\2=15
х2=(10-20)\2=-5
х2=-5 не удовлетворяет условию
ответ х=15
2/(Х^2+10Х+25)-10/(25-Х^2)-1/(Х+5)
2/(х+5)^2-10/(х+5)*(х-5)-1/(х+5)=0
2*(х-5)*(х+5)-10(х+5)- 1(х+5)*(х-5)=0
(х+5)(х+5)(х-5)
2х^2-50-10x-50-x^2+25 =0
(х+5)(х+5)(х-5)
x^2-10x-75=0 (х+5)(х+5)(х-5) не равно 0
Д=100+4*75=400
х1=(10+20)\2=15
х2=(10-20)\2=-5
х=15