计算:(5x-2y)^2=
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计算:(5x-2y)^2=计算:(5x-2y)^2=计算:(5x-2y)^2=(5x-2y)^2=25x^2-20xy+4y^2(5x-2y)^2=25x^2-20xy+4y^225x-20xy+4y
计算:(5x-2y)^2=
计算:(5x-2y)^2=
计算:(5x-2y)^2=
(5x-2y)^2=25x^2-20xy+4y^2
(5x-2y)^2=25x^2-20xy+4y^2
25x-20xy+4y
计算:(5x-2y)^2=
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