2道配方法解方程(1)1/3x²-x-4=0 2x²-7x+6=0x-3x=12 x²-7/2x=-3x²-3x+(3/2)²=12+(3/2)² x²-7/2x+(7/4)²=-3+(7/4)²请问(3/2)²是怎么来的 请问(7/4)²是怎么来的
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/08 18:03:07
![2道配方法解方程(1)1/3x²-x-4=0 2x²-7x+6=0x-3x=12 x²-7/2x=-3x²-3x+(3/2)²=12+(3/2)² x²-7/2x+(7/4)²=-3+(7/4)²请问(3/2)²是怎么来的 请问(7/4)²是怎么来的](/uploads/image/z/5243735-47-5.jpg?t=2%E9%81%93%E9%85%8D%E6%96%B9%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%881%EF%BC%891%2F3x%26%23178%3B-x-4%3D0+2x%26%23178%3B-7x%2B6%3D0x-3x%3D12+x%26%23178%3B-7%2F2x%3D-3x%26%23178%3B-3x%2B%EF%BC%883%2F2%EF%BC%89%26%23178%3B%3D12%2B%EF%BC%883%2F2%EF%BC%89%26%23178%3B+x%26%23178%3B-7%2F2x%2B%EF%BC%887%2F4%EF%BC%89%26%23178%3B%3D-3%2B%EF%BC%887%2F4%EF%BC%89%26%23178%3B%E8%AF%B7%E9%97%AE%EF%BC%883%2F2%EF%BC%89%26%23178%3B%E6%98%AF%E6%80%8E%E4%B9%88%E6%9D%A5%E7%9A%84+%E8%AF%B7%E9%97%AE%EF%BC%887%2F4%EF%BC%89%26%23178%3B%E6%98%AF%E6%80%8E%E4%B9%88%E6%9D%A5%E7%9A%84)
2道配方法解方程(1)1/3x²-x-4=0 2x²-7x+6=0x-3x=12 x²-7/2x=-3x²-3x+(3/2)²=12+(3/2)² x²-7/2x+(7/4)²=-3+(7/4)²请问(3/2)²是怎么来的 请问(7/4)²是怎么来的
2道配方法解方程
(1)1/3x²-x-4=0 2x²-7x+6=0
x-3x=12 x²-7/2x=-3
x²-3x+(3/2)²=12+(3/2)² x²-7/2x+(7/4)²=-3+(7/4)²
请问(3/2)²是怎么来的 请问(7/4)²是怎么来的
2道配方法解方程(1)1/3x²-x-4=0 2x²-7x+6=0x-3x=12 x²-7/2x=-3x²-3x+(3/2)²=12+(3/2)² x²-7/2x+(7/4)²=-3+(7/4)²请问(3/2)²是怎么来的 请问(7/4)²是怎么来的
两边同时加(3/2)² -3x中的3除以2
两边同时加(7/4)² -7/2x中的7/2除以2