计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
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计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)[(x+2y)
计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
计算：[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
=[(x-2y)(x+2y+x-2y)]÷(6x)
=[2x(x-2y)]÷(6x)
=(x-2y) / 3
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