x(x+y)-(x-y)(x+y)-y^2,其中x - 知识问答

x(x+y)-(x-y)(x+y)-y^2,其中x=(1/4)的2010次方,y=4的2011次方

1个回答

原式=(x+y)(x-x+y)-y^2
=y(x+y)-y^2
=y(x+y-y)
=yx
=4^2011×(1/4)^2010
=(4×1/4)^2010×4
=4

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