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(2002•大连)解方程,设y=,则原方程变形为A.y2-5y+2=0B.2y2-5y+2...
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(2002•大连)解方程
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF0AAAAlCAYAAAAgAOVvAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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XuiCMLlTvdC5pDLslqk/7sZ+0stvjvLQ5wF1nLEGM0S8pi+T7lWvp51IbmDBuFkPDmj333LQV7jD
7HmGBdkv1yCgKwqM0lYpCt0mRAHoGA/xTEecLPNsjxT4M8ftYve56EWhG6eQDNLQFz31e9s9rB7O
D53pezZYWL+M9eFFdta6hLkkM50bW3RHS0A/HM4DwD9vKg3djIedg4EQ4LFz24RXn3CHwf4mc6Sm
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FK8eYj/RqdgeLC+b6xV6TqbPazZFW6sI9HmQu6iwTCdjexi6v35WeYHjCxtlazIG+AL6Pta9TO/U
dR86K7ba0E3vf9x1/npJ6LDIfv/lsHcLTGr4RXtRZjjdzwrPhX4ntq0/iMMBk5S3mrw7ZJ0TM5Tv
hRnhZEBnzNqkyQv9gW15FDrV5zdzCoU35lHop7U0Wl5yanpsjLknqGxKcZpiG/jNgJ7iL8VWOLGD
6UjopQNIbSUfueSFIbzQhYFypmsHOidar09nDnnGLCLe1IEuqM6IlhdhVcvuLiHelIcurM5kQa+k
au3QKfGmPHQTidzrUynoFBjRmuSJNzT0xtSZE3RubJx2VEDVutooX7yhoZuZ2lFnwkzPiA0RPCRU
LRQ6It4woTOUo+h5LFteSOWIynQhVStEgIs3bOjmNWi2kl8WOhlbJVXLh34l3ij9/fzeGX/smGbU
GanYKqlaLvSYeKO+36+xHTulu/HP/N2KOiMWWyVVa4dOiTdHeTFZtWV7bXWGbM8KxEaBIWO6YXCq
6Z9VmoNsz+qFbwTBGdpybJz4XZsT9L+x06obm4Tecmy3oMNgyKgWM7312FLA81vGlFkL2raaEClL
/gegpLjWAk9nSQAAAABJRU5ErkJggg==
)
,设y=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAlCAYAAAC6TzLyAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAF0SURBVFhH7ZdBEoMgDEVzLhccxz03cc1B3HKQ
LjhKalAwIgqljXahM904xOf/hPgLmLkAAC/5HcFz9399Dx44d4D2+4pL3nar1+ZVBh1T9Tv4BNE2
8csZVPGmRU2niC0ShTtrN0qdUQhMfRkebItFi4LEQswpTxuHnvW5codGKTSOwBqDu1afDaN1XXgH
Ws+3pqx8qfSWMfDuNJSUb/Z/rq6GIxWnVvM3OIWTc3snquF2Uq6ArD+YACdwq/N1VXCynPYq7lkO
dAAPtfGV2boinKadCnJD5+8OdN6NfEOu9hfhkmP2gW/c/ZuvmlSc+mzICHTe03CyDUffhcxolrc9
xqj9fJeHe08pB7TAa5PM6WlohfuHNiSZzcfnK/iELyUZOeUkvpBkmuBjv4T6PpbnZnsxybTAx3H0
ZUMH2A2vOdglf5eqkkwLPNZ4B2b1HP5Nkpl7lQbMGrEPo3M/LSL1t3xSX0OH0A33wMklUn+L8rD/
V8HfYG7baptIGtwAAAAASUVORK5CYII=
)
,则原方程变形为( )
A.y
2-5y+2=0
B.2y
2-5y+2=0
C.y
2-5y-1=0
D.2y
2+5y+2=0
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