来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/12 13:29:32
数学这两道题(化简求值的)
(1)(x-y)*(2x-y)/(x+y)(x-y) * 5(x+y)/(2x-y) 约分后=5
(2)(a-2b)(a-b)/(a-2b)(4a+3b)*2a(a-b)/a-2b,约分 再答: (1)(x-y)*(2x-y)/(x+y)(x-y) * 5(x+y)/(2x-y) 约分后=5 (2)(a-2b)(a-b)/(a-2b)(4a+3b)/2a(a-b)/(a-2b),约分=a-2b/2a(4a+3b),把a、b值带入=2/5