36-a^2/a^2+10a+25÷6-a/2a+10×a-5/a^2+6a=(6+a)(6-a)/(a+5)^2÷(6-a)/2(a+5)×(a-5)/a(a+6)=(6+a)(6-a)/(a+5)^2×2(a+5)/(6-a)×(a-5)/a(a+6)=2(a-5)/a(a+5) a=根号2=2(根号2-5)/(根号2*(根号2+5))=根号2(根号2-5)...