题目

1.[2(a+b)^5-3(a+b)^4+(-a-b)^3]除以2（a+b）^3 2.(5ax^2+15x)除以5x 3.(12m^2n+15mn^2)除以6mn
计算题

提问时间：2021-12-14

答案

1.[2(a+b)^5-3(a+b)^4+(-a-b)^3]除以2（a+b）^3
=2(a+b)^5除以2（a+b）^3-3(a+b)^4除以2（a+b）^3+(-a-b)^3÷2（a+b）^3
=(a+b)^2-1.5(a+b)+0.5
2.(5ax^2+15x)除以5x
=5ax^2除以5x +15x除以5x
=ax+3
3.(12m^2n+15mn^2)除以6mn
=12m^2n除以6mn+15mn^2除以6mn
=2m+2.5n