若多项式2x³-x²+x-1与多项式3x³+2mx²-5x+3相加后不含二次项,求m的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 12:13:57
![若多项式2x³-x²+x-1与多项式3x³+2mx²-5x+3相加后不含二次项,求m的值](/uploads/image/z/1643968-64-8.jpg?t=%E8%8B%A5%E5%A4%9A%E9%A1%B9%E5%BC%8F2x%26%23179%3B-x%26%23178%3B%2Bx-1%E4%B8%8E%E5%A4%9A%E9%A1%B9%E5%BC%8F3x%26%23179%3B%2B2mx%26%23178%3B-5x%2B3%E7%9B%B8%E5%8A%A0%E5%90%8E%E4%B8%8D%E5%90%AB%E4%BA%8C%E6%AC%A1%E9%A1%B9%2C%E6%B1%82m%E7%9A%84%E5%80%BC)
若多项式2x³-x²+x-1与多项式3x³+2mx²-5x+3相加后不含二次项,求m的值
若多项式2x³-x²+x-1与多项式3x³+2mx²-5x+3相加后不含二次项,求m的值
若多项式2x³-x²+x-1与多项式3x³+2mx²-5x+3相加后不含二次项,求m的值
两个多项式的二次项之和
=-x²+2mx²
=(2m-1)x²
由题意:
2m-1=0
m=2分之1