1、aa2)(aa2性质性质1：性质性质2：aa2 112xx xx631 232x 14x 少？少？这个长方形的面积是多这个长方形的面积是多，宽为，宽为、一个长方形的长为、一个长方形的长为cmcm36136长方形的面积为长方形的面积为解解:4194419325422541)()()()(232335752321)()(成立吗？成立吗？9494)()(没有意义。没有意义。、94abbaabba31274323212313)()()()(ababxx6361231231)(24332xxxxxx)(bbabababab66323232)()(39312731274)(abmnbnam2741251)
2、(101562)(2741251)(271245)(933420233220)(3601820101562553322532)(30302101562)(abbabaab234)4(1527)3(12)2(8116)1(ba练习二：n化简：化简：63216)5(72)4()36()25()3(2432)2(1259)1(zyx练习三54327)6()4(5)5()3213(152)4(313)3(10253)2(714)1(babbaabxyx4325yx化简化简.,00025443xyyx4325yx3425xyxxy25xxy25二次根式的除法2516325163942941)()()()
3、(3232545432321)(75752)(baba1813223241)()(2283243241)(183218132181322)(3212 babababa2925210031xy)()(xyxyxyxy3535925925222222)(103100310031)(x32738322321)()()(363636333232322236363332322)(2622232322328322)(xxxxxxxx339333273273)(练习：n1、计算：2205)4(62)3(672)2(218)1(abbaa练习：n2、化简：、化简：426416)3(123)2(252)1(ba练习：n3、计算（分母有理化）、计算（分母有理化）81)4(34)3(23)2(21)1(321)8(231)7(2783)6(3)5(ab)(,222325532227591812baxyabyxabcyxxa21223222330252383023原式原式解解:)(25810223)(528102123244323abbabaabbabababa22322222879446452129443312592241cbacba)()()()()()()(212231514371)()()()(aabab232323
