一元二次方程根的判别式应用
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1005-9741|volume|4|47-48
ISSN: 1005-9741
Source: 河北理科教学研究, Vol.volume, Iss.4, 2017-01, pp. : 47-48
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Abstract