计算:1、[(a-b分之a²)+(b-a分之b²)]÷a-b分之a+b;2、(x-1分之x²)-(x)-(1)3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+14、[(a²-4a+4分之a-1)-(a²-2a分之a+2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/20 08:21:12
![计算:1、[(a-b分之a²)+(b-a分之b²)]÷a-b分之a+b;2、(x-1分之x²)-(x)-(1)3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+14、[(a²-4a+4分之a-1)-(a²-2a分之a+2](/uploads/image/z/603162-18-2.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A1%E3%80%81%5B%EF%BC%88a-b%E5%88%86%E4%B9%8Ba%26%23178%3B%EF%BC%89%2B%EF%BC%88b-a%E5%88%86%E4%B9%8Bb%26%23178%3B%EF%BC%89%5D%C3%B7a-b%E5%88%86%E4%B9%8Ba%2Bb%EF%BC%9B2%E3%80%81%EF%BC%88x-1%E5%88%86%E4%B9%8Bx%26%23178%3B%EF%BC%89-%EF%BC%88x%EF%BC%89-%EF%BC%881%EF%BC%893%E3%80%81%5B%EF%BC%88x%26%23178%3B%2Bx%E5%88%86%E4%B9%8Bx%26%23179%3B-x%26%23178%3B%EF%BC%89-%EF%BC%88x%2B1%E5%88%86%E4%B9%8B1-x%26%23178%3B%EF%BC%89%5D%C3%B7x%2B1%E5%88%86%E4%B9%8B2x%2B14%E3%80%81%5B%28a%26%23178%3B-4a%2B4%E5%88%86%E4%B9%8Ba-1%29-%28a%26%23178%3B-2a%E5%88%86%E4%B9%8Ba%2B2)
计算:1、[(a-b分之a²)+(b-a分之b²)]÷a-b分之a+b;2、(x-1分之x²)-(x)-(1)3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+14、[(a²-4a+4分之a-1)-(a²-2a分之a+2
计算:1、[(a-b分之a²)+(b-a分之b²)]÷a-b分之a+b;2、(x-1分之x²)-(x)-(1)
3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+14、[(a²-4a+4分之a-1)-(a²-2a分之a+2)]÷(a分之4)-(1)5、化简[(m²-n²分之m²+n²)-(m+n分之m-n)]÷[(m+n)²(m-n)分之2mn]
计算:1、[(a-b分之a²)+(b-a分之b²)]÷a-b分之a+b;2、(x-1分之x²)-(x)-(1)3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+14、[(a²-4a+4分之a-1)-(a²-2a分之a+2
先帮你做3个,另外三个再求助一下,好吗?
(a²-b²)/(a-b) ÷(a+b)/(a-b)
=(a+b)(a-b)/(a-b)×(a-b)/(a+b)
=a-b
2、=x²/(x-1) -(x+1)(x-1)/(x-1)
=(x²-x²+1)/(x-1)
=1/(x-1)
3、[(x²+x分之x³-x²)-(x+1分之1-x²)]÷x+1分之2x+1
=[x²(x-1)/x(x+1)+(x+1)(x-1)/(x+1)]×(x+1)/(2x+1)
=[x(x-1)+(x+1)(x-1)]/(x+1) ×(x+1)/(2x+1)
=(2x+1)(x-1)/(2x+1)
=x-1