2/((abs(x))^2)=1/(abs(x-0.15)^2)
(sqrt(2))/(abs(x))=1/(abs(x-.15))
(abs(x))/(sqrt(2))=abs(x-.15)

x>=.15のとき
x/(sqrt(2))=x-.15
x=.512

0<=x<.15のとき
x/(sqrt(2))=-x+.15
x=.0879

x<0
-x/(sqrt(2))=-x-.15
x=-.512