已知|m+2|+(n+3)²=0,求代数式3m²n-mn²+5
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 20:11:19
![已知|m+2|+(n+3)²=0,求代数式3m²n-mn²+5](/uploads/image/z/696048-24-8.jpg?t=%E5%B7%B2%E7%9F%A5%7Cm%2B2%7C%2B%EF%BC%88n%2B3%EF%BC%89%26%23178%3B%3D0%2C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F3m%26%23178%3Bn-mn%26%23178%3B%2B5)
x){}Kkrj6~SM@Ʀ'?~\pnnmjTOv6Tq`g
Ov/*JBrmutluT<(fkhmjkbi_\gr' Iz
已知|m+2|+(n+3)²=0,求代数式3m²n-mn²+5
已知|m+2|+(n+3)²=0,求代数式3m²n-mn²+5
已知|m+2|+(n+3)²=0,求代数式3m²n-mn²+5
|m+2|+(n+3)²=0
所以m+2=n+3=0
m=-2,n=-3
所以原式=-36-18+5=-49