4y²-(根号2+4)y+根号2=0
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4y²-(根号2+4)y+根号2=0
![4y²-(根号2+4)y+根号2=0](/uploads/image/z/18153882-18-2.jpg?t=4y%26%23178%3B-%28%E6%A0%B9%E5%8F%B72%2B4%29y%2B%E6%A0%B9%E5%8F%B72%3D0)
〖4y〗^2-(√2+4)y+√2=0
〖4y〗^2-√2 y-4y+√2=0
〖4y〗^2-4y-√2 y+√2=0
4y(y-1)-√2 (y-1)=0
(y-1)(4y-√2)=0
∴y_1=1 y_2=√2/4
![](http://img.wesiedu.com/upload/f/7d/f7d424bc0faee1cc40a780cb54d6490e.jpg)
〖4y〗^2-√2 y-4y+√2=0
〖4y〗^2-4y-√2 y+√2=0
4y(y-1)-√2 (y-1)=0
(y-1)(4y-√2)=0
∴y_1=1 y_2=√2/4
![](http://img.wesiedu.com/upload/f/7d/f7d424bc0faee1cc40a780cb54d6490e.jpg)
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