This is a preview. Log in through your library . Abstract In this paper, we study high-dimensional sparse Quadratic Discriminant Analysis (QDA) and aim to establish ...
If \(kx^{2}+5x-\frac{5}{4}=0\) has equal roots, then \(b^2-4ac=0\). \(a=k\), \(b=5\) and \(c= - \frac{5}{4}\). \(b^2-4ac=0\) \(5^2 -4\times k \times - \frac{5}{4}=0 ...
For the quadratic function \(y=2x^{2}-7x-15\) determine the nature of the roots.
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