作业帮初一分式加减1.2/(x-1)-(x+1)/(x-1)2.2a/(a^-4）-1/（a-2）3.3x/(x-3)^2+x/(x-3)4.【2a/(x-2)-x(x+2)】*(x^2-4)/x
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 07:33:30
初一分式加减1.2/(x-1)-(x+1)/(x-1)2.2a/(a^-4）-1/（a-2）3.3x/(x-3)^2+x/(x-3)4.【2a/(x-2)-x(x+2)】*(x^2-4)/x
初一分式加减
1.2/(x-1)-(x+1)/(x-1)
2.2a/(a^-4）-1/（a-2）
3.3x/(x-3)^2+x/(x-3)
4.【2a/(x-2)-x(x+2)】*(x^2-4)/x
初一分式加减1.2/(x-1)-(x+1)/(x-1)2.2a/(a^-4）-1/（a-2）3.3x/(x-3)^2+x/(x-3)4.【2a/(x-2)-x(x+2)】*(x^2-4)/x
1.2/(x-1)-(x+1)/(x-1)
=[2-(x+1)]/(x-1)
=(-x+1)/(x-1)
=-(x-1)/(x-1)
=-1
2.2a/(a^2-4）-1/（a-2）
=2a/(a+2)(a-2)-(a+2)/(a+2)(a-2)
=(2a-a-2)/(a+2)(a-2)
=(a-2)/(a+2)(a-2)
=1/(a+2)
3.3x/(x-3)^2+x/(x-3)
=3x/(x-3)^2+x(x-3)/(x-3)^2
=(3x+x^2-3x)/(x-3)^2
=x^2/(x-3)^2
4.【2x/(x-2)-x(x+2)】*(x^2-4)/x
错了
【2x/(x-2)-x/(x+2)】*(x^2-4)/x
=x{[2(x+2)-(x-2)]/(x+2)(x-2)}*[(x+2)(x-2)/x]
=2(x+2)-(x-2)
=2x+4-x+2
=x+6
1.=2-x-1/x-1=1-x/x-1=-1(提个负号）
2.不会
3.=3x/(x-3)^2+x^2-3x/(x-3)^2=x^2/(x-3)^2
4.看不懂
sorry
初一分式加减1.2/(x-1)-(x+1)/(x-1)2.2a/(a^-4）-1/（a-2）3.3x/(x-3)^2+x/(x-3)4.【2a/(x-2)-x(x+2)】*(x^2-4)/x
x/1-x-(1/x-3)分式加减x/1-x-(1/x-3)是分式加减
1/x+5-1/1-x 分式的加减
2X+2+5除以（X-1）分式加减
2x-2加上x-1分之5 分式加减,
一道七年级分式加减题(x+1-1/1-x)÷(x-x2/x-1)
（1/2x+2)-（x/x^2-1）+（1/x-1）分式加减
1/x+3+1-x/6+2x-6/x^2-9. 分式加减
分式的加减：1/(x-5) - 6/(x^2-25) -(x+1)/(10+2x)
1/(2+2x)-x/(x2-1)+1/(x-1)分式加减
分式加减计算(5）／(x+1）-(2x-1）／(X+1)²
分式的加减2/(x-1)^2-2x/(1-x)^2
数学分式的加减要过程x-1分之x+ x
分式的加减:2x^2-5x-2+3/(x^2+1)
分式的加减1
分式的加减1
分式加减1/1-x-1/1+x-2x/1+x+-4x三次/1+x四次
分式的加减(1/x+1/y)^2-(1/x-1/y)^2