x9y3的知识精选

x2+ax﹣y﹣(bx2﹣x+9y+3)的值与x的取值无关,则﹣a+b的值为(  )A.0          ...
问题详情:x2+ax﹣y﹣(bx2﹣x+9y+3)的值与x的取值无关,则﹣a+b的值为()A.0                          B.﹣1                        C.﹣2                     ...
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