若实数x,y满足(x+y)(x+y-3)+2=0,则x+y的值为( ) A.-1或-2 B.-1或2 C.1或-2 D.1或
若实数x,y满足(x+y)(x+y-3)+2=0,则x+y的值为()A.-1或-2B.-1或2C.1或-2D.1或2...
若实数x,y满足(x+y)(x+y-3)+2=0,则x+y的值为( ) A.-1或-2 B.-1或2 C.1或-2 D.1或2
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