几道初二的数学题,数学学吧and高手请进!①通分:(a-1)/(a²+2a+1),3/(1-a²)②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3) (x²-2x+1)/(x²-1)÷(x
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![几道初二的数学题,数学学吧and高手请进!①通分:(a-1)/(a²+2a+1),3/(1-a²)②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3) (x²-2x+1)/(x²-1)÷(x](/uploads/image/z/5371559-71-9.jpg?t=%E5%87%A0%E9%81%93%E5%88%9D%E4%BA%8C%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E6%95%B0%E5%AD%A6%E5%AD%A6%E5%90%A7and%E9%AB%98%E6%89%8B%E8%AF%B7%E8%BF%9B%21%E2%91%A0%E9%80%9A%E5%88%86%EF%BC%9A%EF%BC%88a-1%EF%BC%89%2F%EF%BC%88a%26%23178%3B%2B2a%2B1%EF%BC%89%2C3%2F%EF%BC%881-a%26%23178%3B%EF%BC%89%E2%91%A1%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%88x%26%23178%3B-6x%2B9%EF%BC%89%2F%EF%BC%88x%26%23178%3B-1%C2%B7x%26%23178%3B%EF%BC%89%2B%EF%BC%88x%26%23178%3B%2Bx%EF%BC%89%2F%EF%BC%88x-3%EF%BC%89++++++++++++++%EF%BC%88x%26%23178%3B-2x%2B1%EF%BC%89%2F%EF%BC%88x%26%23178%3B-1%EF%BC%89%C3%B7%EF%BC%88x%26%2317)
几道初二的数学题,数学学吧and高手请进!①通分:(a-1)/(a²+2a+1),3/(1-a²)②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3) (x²-2x+1)/(x²-1)÷(x
几道初二的数学题,数学学吧and高手请进!
①通分:(a-1)/(a²+2a+1),3/(1-a²)
②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3)
(x²-2x+1)/(x²-1)÷(x²+x)/x+1
求详细解题过程,谢谢!
几道初二的数学题,数学学吧and高手请进!①通分:(a-1)/(a²+2a+1),3/(1-a²)②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3) (x²-2x+1)/(x²-1)÷(x
(1)通分:(a--1)/(a^2+2a+1)=(a--1)/(a+1)^2=(a--1)^1/(a+1)^2(a--1)
3/(1--a^2)=--3/(a+1)(a--1)=--3(a+1)/(a+1)^2(a--1).
(2)计算:(x^2--6x+9)/?+
(x^2--2x+1)/(x^2--1)除以(x^2+x)/(x+1)
=(x--1)^2/(x+1)(x--1)乘以(x+1)/x(x+1)
=(x--1)/(x+1)乘以1/x
=(x--1)/x(x+1).
几道初二的数学题,数学学吧and高手请进!①通分:(a-1)/(a²+2a+1),3/(1-a²)②计算:(x²-6x+9)/(x²-1·x²)+(x²+x)/(x-3) (x²-2x+1)/(x²-1)÷(x
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