x+y=2求[x+y]3立方.[2x+2y]2立方

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x+y=2求[x+y]3立方.[2x+2y]2立方

x+y=2求[x+y]3立方.[2x+2y]2立方
x+y=2求[x+y]3立方.[2x+2y]2立方

x+y=2求[x+y]3立方.[2x+2y]2立方
[x+y]3立方
=2^3
=8
.[2x+2y]2立方
=[2x2]^2
=16