1.用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( )A.y²+3y+2=0 B.y²-3y-2=0 C.y²+3y-2=0 D.y²-3y+2=02.两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 12:07:44
![1.用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( )A.y²+3y+2=0 B.y²-3y-2=0 C.y²+3y-2=0 D.y²-3y+2=02.两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的](/uploads/image/z/376635-3-5.jpg?t=1.%E7%94%A8%E6%8D%A2%E5%85%83%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%88x-1%2Fx%29%26%23178%3B-3x%2B3%2F%EF%BC%88x%EF%BC%89%2B2%3D0%E6%97%B6%2C%E8%8B%A5%E8%AE%BEx-1%2F%EF%BC%88x%29%3Dy%2C%E5%88%99%E5%8E%9F%E6%96%B9%E7%A8%8B%E5%8F%AF%E4%BB%A5%E8%BD%AC%E5%8C%96%E4%B8%BA%EF%BC%88+%EF%BC%89A.y%26%23178%3B%2B3y%2B2%3D0+B.y%26%23178%3B-3y-2%3D0+C.y%26%23178%3B%2B3y-2%3D0+D.y%26%23178%3B-3y%2B2%3D02.%E4%B8%A4%E4%B8%AA%E4%B8%8D%E7%9B%B8%E7%AD%89%E7%9A%84%E5%AE%9E%E6%95%B0m%2Cn%E6%BB%A1%E8%B6%B3%3Am%26%23178%3B-6m%3D4%2Cn%26%23178%3B-6n%3D4%2C%E5%88%99m%C2%B7n%E7%9A%84)
1.用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( )A.y²+3y+2=0 B.y²-3y-2=0 C.y²+3y-2=0 D.y²-3y+2=02.两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的
1.用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( )
A.y²+3y+2=0 B.y²-3y-2=0 C.y²+3y-2=0 D.y²-3y+2=0
2.两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的值为( )
A.6 B.-6 C.4 D.-4
3.一个一元二次方程的两个根分别为-根号2和1,那么这个一元二次方程可以是______
1.用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( )A.y²+3y+2=0 B.y²-3y-2=0 C.y²+3y-2=0 D.y²-3y+2=02.两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的
用换元法解方程(x-1/x)²-3x+3/(x)+2=0时,若设x-1/(x)=y,则原方程可以转化为( D.y²-3y+2=0)
两个不相等的实数m,n满足:m²-6m=4,n²-6n=4,则m·n的值为( D.-4 )
一个一元二次方程的两个根分别为-根号2和1,那么这个一元二次方程可以是_(x+根号2)(x-1)=0_____