Question: How can i solve this equation?

hi all

how can i solve this program?

restart;
I5:=evalf(int((x^2)/((x^4-2*x0*x^2+x0^2+1)^(3/2)),x=0..infinity)):
I6:=evalf((1/2)*int(1/(x^4-2*x0*x^2+x0^2+1)^(1/2),x=0..infinity)):
A:=f-evalf((-4/Pi)*((x0*I6-I5)/(x0*I5+I6)^(1/3))):
B:=solve(A,x0);

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