Save guides, add subjects and pick up where you left off with your BBC account. If \(kx^{2}+5x-\frac{5}{4}=0\) has equal roots, then \(b^2-4ac=0\). \(a=k\), \(b=5 ...

4ac\textgreater0\), the roots are real and unequal (diagram A) If \({b^2} - 4ac = 0\), the roots are real and equal (diagram B) If \({b^2} - 4ac\textless0\), the roots are non-real (diagram C ...