25/144 n^3-5 와 44/49 n= (a+b)^2-8(a+b)(a-b)+16(a-b)^2=___________________________

25/144 n^3-5 와 44/49 n= (a+b)^2-8(a+b)(a-b)+16(a-b)^2=___________________________

1.(25/144)n(n-204/35)(n+204/35)
2.(3a-5b)^2