第1页(共12页) 合并同类项50 题(一) 1 . 5279abab 2 .223462xyyx. 3 .22753268xxxx 4 .12523abab. 5 .22221350 .7 544aba ba bab 6 .322383649aa ba ba 7 .223254xyyxyy 8 .22676598aaaa 9 .222243224abababab. 1 0 .2223465xxxx 第2页(共12页) 1 1 .22223xxyxxy 1 2 .2267946abab 1 3 . 722abab. 1 4 .222233224yxxyxy. 1 5 .2222324332xxyyxyyx 1 6 .22224335aba baba b 1 7 .22223567x yxyxyx y 1 8 .2274233aaaa 1 9 .3245aa. 2 0 .3233354229xxxxxx 第3页(共12页) 2 1 .22222317326mnn mmnn m 22 .2332572x yxxx y 23 .2213(24)2(5)2xxxx. 24 .2212(2 )(612 )102xyxy. 25 .2(53 )3(3 )aabab 26 .23(2 )mn 27 .13(2)2 (4)20092xyxy. 2 8 . ()(43)(53)ababcabc. 29 .222294(23)4mmmnnn. 30 .222212()(3)2x yxxx y. 第4页(共12页) 31.22225(3)(3)a bababa b 32.221[7(43)3]2 xxxx 33.22(24 )(51)aaaa 34.22(4 )8mmnnn. 35.2242(231)a baba bab 36.116(1)(21)23xx 37.[5(2)2 ]xyxzy 38.224(32)(21)xxxx. 39. 3(34)x 40.22(212 )(1)aaaa 第5页(共12页) 41.43[3(42 )8]xxx 42.223(2 )2(3 )a bba bb 43.2()2()aabab 44.22222(3)(5)1a bababa b 45.32234(3)( 25)abba 46.3(1)(5)xx 47.22213(54)62aaaaa 48.22(621)2(342)aaaa 49.223(2)2( 3)aababb 50.已知23Ax,21312Bxx ,求2AB的值. 第6页(共12页) 合并同类项50 题(一) 参考答案与试题解析 1 .计算:5279abab 【解答】解:5279abab ( 57)( 29 )aabb 27ab. 2 .化简:223462xyyx. 【解答】解:原式223462xyyx 22(32)( 46)xxyy ...