作业帮已知|x+2|+（y+3）²＝0,求6xy²-[3x²y-（2x²y-xy²）]的值.
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 19:48:59
![已知|x+2|+（y+3）²＝0,求6xy²-[3x²y-（2x²y-xy²）]的值.](/uploads/image/z/6132294-54-4.jpg?t=%E5%B7%B2%E7%9F%A5%7Cx%2B2%7C%2B%EF%BC%88y%2B3%EF%BC%89%26%23178%3B%EF%BC%9D0%2C%E6%B1%826xy%26%23178%3B-%5B3x%26%23178%3By-%EF%BC%882x%26%23178%3By-xy%26%23178%3B%EF%BC%89%5D%E7%9A%84%E5%80%BC.)
已知|x+2|+（y+3）²＝0,求6xy²-[3x²y-（2x²y-xy²）]的值.
已知|x+2|+（y+3）²＝0,求6xy²-[3x²y-（2x²y-xy²）]的值.
已知|x+2|+（y+3）²＝0,求6xy²-[3x²y-（2x²y-xy²）]的值.
x=-2 y=-3
6xy²-3x²y+2x²y-xy²
=-x²y+5xy²
=xy(-x+5y)
=-78
