(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/25 09:39:35
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)

(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)

(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
化简的
=(3a-6b-4a+5b)/(a+b)-(5a-6b-7a+8b)/(a-b)
=(-a-b)/(a+b)-(-2a+2b)/(a-b)
=-1-(-2)
=1

先通分母、得到(2a-2b)/(a-b)-(a+b)/(a+b)、最后得到2-1→1、希望回答可以帮得到你、如果有疑问欢迎追问、大家一起探讨^_^

=(3a-6b-4a+5b)/(a+b)-(5a-6b-7a+8b)/(a-b)
=(-a-b)/(a+b)-(-2a+2b)/(a-b)
=-1-(-2)
=1