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（2-3）×
【答案】分析：觀察，可以首先把括號內(nèi)的化簡，合并同類項，然后相乘．
解答：解：原式=（4×=3×=9．
點評：本題考查的是二次根式的混合運算，在進行此類運算時一般先把二次根式化為最簡二次根式的形式后再運算．
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