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(2000•上海)如果用换元法解方程,设,那么原方程可化为A.y2-3y+2=0B.y2+...
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(2000•上海)如果用换元法解方程
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGgAAAAqCAYAAABfjB7GAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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C9CkldXTIodRoJRR2/VnMeH2jYxV2/7wHUD6LxjRXNxsvRVZNE0n40CD6QCdeIJWWxGgoyxGnV0c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)
,设
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADMAAAAqCAYAAAAeeGN5AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,那么原方程可化为( )
A.y
2-3y+2=0
B.y
2+3y-2=0
C.y
2-2y+3=0
D.y
2+2y-3=0
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