[x-5/(x+5)]-1=3/x^2-25
(x-5)^2-(x^2-25)=3
x^2-10x+25-x^2+25=3
10x=47
x=47/10检验？检验是正确的我要检验的步骤？检验左边=[4.7-5/(4.7+5)]-1=-0.3/9.7-1=-10/9.7=-100/97右边=3/4.7^2-25=3/22.09-25=-3/2.97=-1/0.97=-100/97左边=右边