当x为何值时,7x²+x+4的值与3(3x²-2x)的值相等
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 10:51:22
![当x为何值时,7x²+x+4的值与3(3x²-2x)的值相等](/uploads/image/z/958926-30-6.jpg?t=%E5%BD%93x%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C7x%26%23178%3B%2Bx%2B4%E7%9A%84%E5%80%BC%E4%B8%8E3%EF%BC%883x%26%23178%3B-2x%29%E7%9A%84%E5%80%BC%E7%9B%B8%E7%AD%89)
当x为何值时,7x²+x+4的值与3(3x²-2x)的值相等
当x为何值时,7x²+x+4的值与3(3x²-2x)的值相等
当x为何值时,7x²+x+4的值与3(3x²-2x)的值相等
7x²+x+4=3(3x²-2x)
7x²+x+4=9x²-6x
2x²-7x-4=0
(2x+1)(x-4)=0
x=4或者-0.5
这就是列等式啊7x²+x+4=9x²-6x,2x²-7x-4=0,(x-4)(2x+1)=0,x=4或者x=-1/2