x-2分之2x-6÷(x-2分之5-x-2)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 13:08:27
x-2分之2x-6÷(x-2分之5-x-2)

x-2分之2x-6÷(x-2分之5-x-2)
x-2分之2x-6÷(x-2分之5-x-2)

x-2分之2x-6÷(x-2分之5-x-2)
原式=[2(x-3)/(x-2)]÷[5/(x-2)-(x+2)]
=[2(x-3)/(x-2)]÷{[5-(x+2)(x-2)]/(x-2)}
=[2(x-3)/(x-2)]÷[(5-x²+4)/(x-2)}
=[2(x-3)/(x-2)]×[(x-2)/(9-x²)]
=2(x-3)/[-(x+3)(x-3)
=-2/(x+3)