已知27的2次等于a的6次方等于9的b次,化简(a—5分子1b)的2次方+(a+5分子1b)的2次方+2b（a-25分子

a^6=9^b=27^2=3^6=9^3
a=3,b=3
(a-b/5)^2+(a+b/5)^2+2b(a-b/25)
= a^2-2ab/5+b^2/25+a^2+2ab/5+b^2/25+2ab-2ab/25
=2a^2+2ab
=2*3^2+2*3*3
=36