计算:(1)2x?5x2(2)ba?b+aa+b-2abb2?a2(3)(2xx?3?xx+3)?x2?9x(4)2x?6x?2÷(5x?2?x?2)
计算:(1)2x?5x2(2)ba?b+aa+b-2abb2?a2(3)(2xx?3?xx+3)?x2?9x(4)2x?6x?2÷(5x?2?x?2)....
计算:(1)2x?5x2(2)ba?b+aa+b-2abb2?a2(3)(2xx?3?xx+3)?x2?9x(4)2x?6x?2÷(5x?2?x?2).
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