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(2002•浙江)方程,如果,那么原方程变为A.y2+2y-3=0B.y2+2y+3=0C...
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(2002•浙江)方程
,如果
,那么原方程变为( )
A.y
2+2y-3=0
B.y
2+2y+3=0
C.2y
2+y+3=0
D.2y
2+y-3=0
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