作业帮[(3x-7)²-(x+5)²]/(4x-24)
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/15 17:19:20
![[(3x-7)²-(x+5)²]/(4x-24)](/uploads/image/z/660149-53-9.jpg?t=%5B%283x-7%29%26%23178%3B-%28x%2B5%29%26%23178%3B%5D%2F%284x-24%29)
[(3x-7)²-(x+5)²]/(4x-24)
[(3x-7)²-(x+5)²]/(4x-24)
[(3x-7)²-(x+5)²]/(4x-24)
[(3x-7)²-(x+5)²]/(4x-24)
(3x-7+x+5)(3x-7-x-5)/[4(x-6)]
=(4x-2)(2x-12)/[4(x-4)]
=4(x-1)(x-6)/[4(x-6)]
=x-1
(3x-7+x+5)(3x-7-x-5)/[4(x-6)]
=(4x-2)(2x-12)/[4(x-4)]
=2(2x-1)(x-6)/[2(x-6)]
=2x-1