课内练习4-整式的乘法VIP免费

1. 计算：;)1(57xx ;)2(88mm ;)()()3(710aa.)()()4(35xyxy解：57)1(xx ;257xx88)2(mm ;1088mm710)()()3(aa;)()(3710aa35)()()4(xyxy.)(2235yxxy2. 计算：);5(10)1(3abab;68)2(232abba解：)5(10)1(3abab1311510ba23268)2(abba231268ba;22b;34 ab2. 计算：);3(21)3(3242yxyx).103()106()4(58解：3422321yx581036;7 y;20001023 )3(21)3(3242yxyx)103()106()4(583. 计算：;)56()1(aaab.5)1015()2(22xyxyyx解：111156aba12111112510515yxyx;56  b.23yx aaab)56()1(xyxyyx5)1015()2(22