（2-3）×
【答案】分析：觀察，可以首先把括號(hào)內(nèi)的化簡(jiǎn)，合并同類(lèi)項(xiàng)，然后相乘．
解答：解：原式=（4×=3×=9．
點(diǎn)評(píng)：本題考查的是二次根式的混合運(yùn)算，在進(jìn)行此類(lèi)運(yùn)算時(shí)一般先把二次根式化為最簡(jiǎn)二次根式的形式后再運(yùn)算．
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