试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)的值与字母x,y的取值无关。
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/06 10:01:17
![试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)的值与字母x,y的取值无关。](/uploads/image/z/224711-71-1.jpg?t=%E8%AF%95%E8%AF%B4%E6%98%8E%EF%BC%9A%E5%A4%9A%E9%A1%B9%E5%BC%8F%EF%BC%885x%26%23179%3B-7x%26%23179%3By%2B3x%26%23178%3By%EF%BC%89%2B2x%26%23179%3B-%EF%BC%88-7x%26%23179%3By%2B3x%26%23178%3By%2B7x%26%23179%3B%EF%BC%89%E7%9A%84%E5%80%BC%E4%B8%8E%E5%AD%97%E6%AF%8Dx%2Cy%E7%9A%84%E5%8F%96%E5%80%BC%E6%97%A0%E5%85%B3%E3%80%82)
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试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)的值与字母x,y的取值无关。
试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)的值
与字母x,y的取值无关。
试说明:多项式(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)的值与字母x,y的取值无关。
(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)
=5x³-7x³y+3x²y+2x³+7x³y-3x²y-7x³
=0