怎样就行,过程写出来.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/04 14:35:52
怎样就行,过程写出来.
![](http://img.wesiedu.com/upload/3/61/361483af4952c9b97f5da4636f8acfbd.jpg)
![](http://img.wesiedu.com/upload/3/61/361483af4952c9b97f5da4636f8acfbd.jpg)
![怎样就行,过程写出来.](/uploads/image/z/14865161-41-1.jpg?t=%E6%80%8E%E6%A0%B7%E5%B0%B1%E8%A1%8C%2C%E8%BF%87%E7%A8%8B%E5%86%99%E5%87%BA%E6%9D%A5.)
23.(1) (2x^3n)^2-(3x^n)^2
化简:4x^6n-9x^2n
=4(x^2n)^3 -9(x^2n)
=4* 2^3-9*2
=4*8-18
=32-18
=14
(2) 原式=a^m÷a^2k*a^3n
=9÷4^2×8^3
=9/16*8*8*8=288
化简:4x^6n-9x^2n
=4(x^2n)^3 -9(x^2n)
=4* 2^3-9*2
=4*8-18
=32-18
=14
(2) 原式=a^m÷a^2k*a^3n
=9÷4^2×8^3
=9/16*8*8*8=288