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Xu, Huakang The equation \(AX^ 2+BX+C=0\) in binary matrices. (Chinese. English summary) Zbl 0856.15014 Pure Appl. Math. 7, No. 1, 84-87 (1991). MSC: 15A24 PDFBibTeX XMLCite \textit{H. Xu}, Pure Appl. Math. 7, No. 1, 84--87 (1991; Zbl 0856.15014)