作业帮初二几道分式计算1.b/(a-b)+a/(a+b)-2ab/(b^2-a^2)2.(2a+2)/(a+1)-(a^2-1
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/07/08 12:54:20
初二几道分式计算
1.b/(a-b)+a/(a+b)-2ab/(b^2-a^2)
2.(2a+2)/(a+1)-(a^2-1)/(a^2-2a+1)
3.(x^2-2x)/x^2-1/[x-1-(2x-1/x+1)
1.b/(a-b)+a/(a+b)-2ab/(b^2-a^2)
2.(2a+2)/(a+1)-(a^2-1)/(a^2-2a+1)
3.(x^2-2x)/x^2-1/[x-1-(2x-1/x+1)
1.=b(a+b)/(a-b)(a+b)+a(a-b)/(a+b)(a-b)-2ab/(b^2-a^2)
=(ab+b^2+a^2-ab)/(a^2-b^2)+2ab/b^2-a^2
=a^2+b^2/(a^2-b^2)-2ab/a^2-b^2
=(a-b)^2/(a+b)(a-b)
=a-b/a+b
2.=2(a+1)/(a+1)-(a^2-1^2)/(a-1)^2
=2-(a+1)(a-1)/(a-1)^2
=2-(a+1)/(a-1)
3 =x(x-2)/(x^2-1^2)-1/{(x+1)(x-1)/(x+1)++(2x-1)/(x+1)
=x(x-2)/(x^2-1^2)-1/(x^2-2x)/(x+1)
=x(x-2)/(x^2-1^2)-(x+1)/x(x-2)
=x+1/(x+1)(x-1)
=1/(x-1)
=(ab+b^2+a^2-ab)/(a^2-b^2)+2ab/b^2-a^2
=a^2+b^2/(a^2-b^2)-2ab/a^2-b^2
=(a-b)^2/(a+b)(a-b)
=a-b/a+b
2.=2(a+1)/(a+1)-(a^2-1^2)/(a-1)^2
=2-(a+1)(a-1)/(a-1)^2
=2-(a+1)/(a-1)
3 =x(x-2)/(x^2-1^2)-1/{(x+1)(x-1)/(x+1)++(2x-1)/(x+1)
=x(x-2)/(x^2-1^2)-1/(x^2-2x)/(x+1)
=x(x-2)/(x^2-1^2)-(x+1)/x(x-2)
=x+1/(x+1)(x-1)
=1/(x-1)
初二几道分式计算1.b/(a-b)+a/(a+b)-2ab/(b^2-a^2)2.(2a+2)/(a+1)-(a^2-1
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+
数学分式计算 快!1. （ a+b/ab）-（b/ab-a^2）2. (1/a-3)+(6/9-a^2)-(a-1/6+
分式计算 [(a^2+ab-ac)/(a^2-ab)]*{[(a-b)^2-c^2]/(ab+a^2+b^2)}/{[a
分式计算：（a-b）分之b+(a+b)分之a-(b的平方-a的平方)分之2ab
若a/b=2,求分式a*a+ab-b*b/a*a-2ab+2b*b
计算：a/b(a-b)-b/a(a-b)；（1/a+1/b）÷a²+2ab+b²/a+b.
计算(a^3-4a^2b-a+4ab^2)/a(a-2b+1)
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
计算：((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)
计算·[(2a+-b)/(a+b)-b/(a+b)]/(a-2b)/(a+b)
初二分式的加减法2a-b-c/（a-b)(a-c)+ 2b-c-a/(b-c)(b-a)+ 2c-b-a/(c-b)(c