Mathematics
Junior High
求解，謝謝🙏
22. 小五:若a≠0,則ax²−2x+a=0有兩個相異的根。
小六:若a>0,則ax²+a-1=0也有兩個相異的根。
9x+18=2
(A)小五說對了,小六說錯了(B)小五說錯了,小六說對了(C)小五、小六都說對(D)小五、小六都說錯
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