当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5是 当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 17:23:13
![当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5是 当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5?](/uploads/image/z/988917-69-7.jpg?t=%E5%BD%93x%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C3%28x%26%23178%3B-2x%2B1%29%E4%B8%8Ex%283x-4%29%E7%9A%84%E5%80%BC%E7%AD%89%E4%BA%8E5%E6%98%AF+%E5%BD%93x%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C3%28x%26%23178%3B-2x%2B1%29%E4%B8%8Ex%283x-4%29%E7%9A%84%E5%B7%AE%E7%AD%89%E4%BA%8E5%EF%BC%9F)
当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5是 当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5?
当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5
是 当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5?
当x为何值时,3(x²-2x+1)与x(3x-4)的值等于5是 当x为何值时,3(x²-2x+1)与x(3x-4)的差等于5?
题目有问题啊
是3(x²-2x+1)与x(3x-4)的值分别等于5?两个题目?
3(x²-2x+1)=5
(x-1)²=5/3
x-1=±√15/3
x=(3-√15)/3,x=(3+√15)/3
x(3x-4)=5
3x²-4x=5
x²-4x/3+4/9=5/3+4/9
(x-2/3)²=19/9
x-2/3=±√19/3
x=(2-√19)/3,x=(2+√19)/3