与（x/2-y/2）^2的结果一样的是A.1/4(X+Y）^2-XYB.(X/2+Y/2)^2+XYC.1/2(X-Y)^D.1/3(X+Y)^-xy请说明理由

Question

与（x/2-y/2）^2的结果一样的是
A.1/4(X+Y）^2-XY
B.(X/2+Y/2)^2+XY
C.1/2(X-Y)^
D.1/3(X+Y)^-xy
请说明理由

Answer 1

A