已知:|m+1|+(2n+3)²;=0,化简求值:3/1(m²n-3nm²)-2/1(mn²+3/1n²m)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 05:35:43
![已知:|m+1|+(2n+3)²;=0,化简求值:3/1(m²n-3nm²)-2/1(mn²+3/1n²m)](/uploads/image/z/3818596-4-6.jpg?t=%E5%B7%B2%E7%9F%A5%3A%7Cm%2B1%7C%2B%282n%2B3%29%26%23178%3B%3B%3D0%2C%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A3%2F1%EF%BC%88m%26%23178%3Bn-3nm%26%23178%3B%EF%BC%89-2%2F1%EF%BC%88mn%26%23178%3B%2B3%2F1n%26%23178%3Bm%EF%BC%89)
已知:|m+1|+(2n+3)²;=0,化简求值:3/1(m²n-3nm²)-2/1(mn²+3/1n²m)
已知:|m+1|+(2n+3)²;=0,化简求值:3/1(m²n-3nm²)-2/1(mn²+3/1n²m)
已知:|m+1|+(2n+3)²;=0,化简求值:3/1(m²n-3nm²)-2/1(mn²+3/1n²m)
|m+1|+(2n+3)²;=0
所以m+1=2n+3=0
m==-1,n=-2/3
所以原式=-3/2m²n--3/2mn²=2/5
3/1(m²n-3nm²)-2/1(mn²+3/1n²m)
表示的意思是不是:3除以(m²n-3nm²)减去2除以(mn²+3/1n²m)