1.b/a-b+1/a 2.(a-2b)平方/ab-(a+2b)平方/ab 3.5-3x/x-2+1-x/2-x 4.x平方-y/(x-3)平方-9-y/(3-x)平方 5.1/2x-4/x平方 6.1/x平方-9-1/x平方+6x+9 7.y平方/y-1-y-1 8.m-15/m平方-9-3/3-m
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 13:57:59
![1.b/a-b+1/a 2.(a-2b)平方/ab-(a+2b)平方/ab 3.5-3x/x-2+1-x/2-x 4.x平方-y/(x-3)平方-9-y/(3-x)平方 5.1/2x-4/x平方 6.1/x平方-9-1/x平方+6x+9 7.y平方/y-1-y-1 8.m-15/m平方-9-3/3-m](/uploads/image/z/3945208-40-8.jpg?t=1.b%2Fa-b%2B1%2Fa+2.%EF%BC%88a-2b%EF%BC%89%E5%B9%B3%E6%96%B9%2Fab-%EF%BC%88a%2B2b%EF%BC%89%E5%B9%B3%E6%96%B9%2Fab+3.5-3x%2Fx-2%2B1-x%2F2-x+4.x%E5%B9%B3%E6%96%B9-y%2F%EF%BC%88x-3%EF%BC%89%E5%B9%B3%E6%96%B9-9-y%2F%EF%BC%883-x%EF%BC%89%E5%B9%B3%E6%96%B9+5.1%2F2x-4%2Fx%E5%B9%B3%E6%96%B9+6.1%2Fx%E5%B9%B3%E6%96%B9-9-1%2Fx%E5%B9%B3%E6%96%B9%2B6x%2B9+7.y%E5%B9%B3%E6%96%B9%2Fy-1-y-1+8.m-15%2Fm%E5%B9%B3%E6%96%B9-9-3%2F3-m)
1.b/a-b+1/a 2.(a-2b)平方/ab-(a+2b)平方/ab 3.5-3x/x-2+1-x/2-x 4.x平方-y/(x-3)平方-9-y/(3-x)平方 5.1/2x-4/x平方 6.1/x平方-9-1/x平方+6x+9 7.y平方/y-1-y-1 8.m-15/m平方-9-3/3-m
1.b/a-b+1/a 2.(a-2b)平方/ab-(a+2b)平方/ab 3.5-3x/x-2+1-x/2-x 4.x平方-y/(x-3)平方-9-y/(3-x)平方 5.1/2x-4/x平方 6.1/x平方-9-1/x平方+6x+9 7.y平方/y-1-y-1 8.m-15/m平方-9-3/3-m
1.b/a-b+1/a 2.(a-2b)平方/ab-(a+2b)平方/ab 3.5-3x/x-2+1-x/2-x 4.x平方-y/(x-3)平方-9-y/(3-x)平方 5.1/2x-4/x平方 6.1/x平方-9-1/x平方+6x+9 7.y平方/y-1-y-1 8.m-15/m平方-9-3/3-m
b/a-(b+1)/a
=-1/a
2.(a-2b)平方/ab-(a+2b)平方/ab
=(a平方-4ab+4b平方)/ab-(a平方+4ab+4b平方)/ab
=-8ab/ab
=-8
3.(5-3x)/(x-2)+(1-x)/(2-x )
=(5-3x)/(x-2)+(x-1)/(x-2)
=(4-2x)/(x-2)
=-2
4.(x平方-y)/(x-3)平方-(9-y)/(3-x)平方
=(x平方-y)/(x-3)平方-(9-y)/(x-3)平方
=(x平方-9)/(x-3)平方
=(x+3)/(x-3)
5.1/2x-4/x平方
=x/2x平方-8/2x平方
=(x-8)/(2x平方)
6.1/(x平方-9)-1/(x平方+6x+9)
=(x+3)/[(x-3)(x+3)平方]-(x-3)/[(x-3)(x+3)平方]
=6/[(x-3)(x+3)平方]
7.y平方/(y-1)-y-1
=y平方/(y-1)-(y平方-1)/(y-1)
=1/(y-1)
8.(m-15)/(m平方-9)-3/(3-m )
=(m-15)/(m平方-9)+(3m+9)/(m平方-9)
=(4m-6)/(m平方-9)