(8x-2y)(8y-2x)为什么等于4(4x-y)(4y-x)
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(8x-2y)(8y-2x)为什么等于4(4x-y)(4y-x)
(8x-2y)(8y-2x)
=[2(4x-y)][2(4y-x)]
=4(4x-y)(4y-x)
=[2(4x-y)][2(4y-x)]
=4(4x-y)(4y-x)
(8x-2y)(8y-2x)为什么等于4(4x-y)(4y-x)
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