分式计算:

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/26 11:11:01
分式计算:

分式计算:
分式计算:

分式计算:
=x(x+2)/(x+2)(x-2)-2/(x-2)
=x/(x-2)-2/(x-2)
=(x-2)/(x-2)
=1

(x²+2x)/(x²-4)-2/(x-2)=(x²+2x)/(x²-4)-2(x+2)/[(x-2)(x+2)]=(x²+2x)/(x²-4)-(2x+4)/(x²-4)
=[(x²+2x)-(2x+4)]/(x²-4)=(x²+2x-2x-4)/(x²-4)=(x²-4)/(x²-4)=1