计算:(1)(x-1)2-(x+2)(x-2);(2)(a3b-4a2b2+2ab3)÷(ab);(3)2x?6x?2÷x?3x2?4x+4
计算:(1)(x-1)2-(x+2)(x-2);(2)(a3b-4a2b2+2ab3)÷(ab);(3)2x?6x?2÷x?3x2?4x+4....
计算:(1)(x-1)2-(x+2)(x-2);(2)(a3b-4a2b2+2ab3)÷(ab);(3)2x?6x?2÷x?3x2?4x+4.
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