求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/20 12:43:40
求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值求(
求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值
求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值
求(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)的值
(2x²-18)÷(4-4x+x²)÷(x+3)·(x-2)÷(3-x)
=2(x²-9)÷[(x+2)(x-2)]÷(x+3)*(x-2)÷(3-x)
=2[ (x-3) (x+3)]÷[(x+2)(x-2)]÷(x+3)*(x-2)÷(3-x)
=2(x-3)÷[(x+2)(x-2)]*(x-2)÷(3-x)
=-2÷[(x+2)(x-2)]*(x-2)
=-2÷(x+2)