if △＞0 ,find the range of possible values of k.
1.-x^2-4x+k=0
2.kx^2+7x+8=0
quadratic equation
2010-09-26 8:32 pm
回答 (1)
2010-09-26 8:47 pm
收錄日期: 2021-04-23 20:42:42
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