(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/101题抄错了,是(a^2-2a+1)/(1-a)1题抄错了,是(a^2-2a+1)/(1-a)5灭错啊
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 14:34:31
![(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/101题抄错了,是(a^2-2a+1)/(1-a)1题抄错了,是(a^2-2a+1)/(1-a)5灭错啊](/uploads/image/z/7580496-48-6.jpg?t=%281%291-a%2Fa%2Aa-2a%2B1+%282%293x-4y%2F8xy-6x%2Ax+%283%292x%2Axy%28x-y%29%2F12xy%2Ay%28y-x%29+%284%29a%2Aa-9%2Fa%2Aa-2a-3+%285%2910a%2Aa-43ab-9b%2Ab%2F101%E9%A2%98%E6%8A%84%E9%94%99%E4%BA%86%2C%E6%98%AF%28a%5E2-2a%2B1%29%2F%281-a%291%E9%A2%98%E6%8A%84%E9%94%99%E4%BA%86%2C%E6%98%AF%28a%5E2-2a%2B1%29%2F%281-a%295%E7%81%AD%E9%94%99%E5%95%8A)
(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/101题抄错了,是(a^2-2a+1)/(1-a)1题抄错了,是(a^2-2a+1)/(1-a)5灭错啊
(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/10
1题抄错了,是(a^2-2a+1)/(1-a)
1题抄错了,是(a^2-2a+1)/(1-a)
5灭错啊
(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x) (4)a*a-9/a*a-2a-3 (5)10a*a-43ab-9b*b/101题抄错了,是(a^2-2a+1)/(1-a)1题抄错了,是(a^2-2a+1)/(1-a)5灭错啊
(1)
(1-a)/(a^2-2a+1)
=(1-a)/(1-a)^2
=1/(1-a)
(2)
(3x-4y)/(8xy-6x^2)
=(3x-4y)/[2x(4y-3x)]
=-1/(2x)
(3)
2x^2y(x-y)/[12x^2(y-x)]
=-y[2x^2(y-x)]/{6[2x^2(y-x)]
=-y/6
(4)
(a^2-9)/(a^2-2a-3)
=[(a+3)(a-3)][(a-3)(a+1)]
=(a+3)/(a+1)
(5)
题目有问题.
(10a^2-43ab-9b^2)/(10ab+2b^2)
=[(2a-9b)(5a+b)][2b(5a+b)]
=(2a-9b)/(2b)