= log9(5^(1/2)) log25(3^(1/2))
= (1/2)log9(5) (1/2)log25(3)
= (1/2)log3^2(5) (1/2)log5^2(3)
= (1/2)(2log3(5)) (1/2)(2log5(3))
= log3(5)/2 log5(3)/2
= (1/2)log3(5) (1/2)log5(3)
= 1/4 (log3(5) * log5(3))