SAT Mathematics Practice Test 4

The given quadratic equation can be rewritten as $2{\mathit{x}}^2-\mathit{k}\mathit{x}-4\mathit{p}=0.$ Applying the quadratic formula,$\frac{-\mathit{b}\pm \sqrt{{\mathit{b}}^2-4\mathit{a}\mathit{c}}}{2\mathit{a}}$, to his equation with $\mathit{a}=2,\mathit{b}=-\mathit{k},$ and $\mathit{c}=-4\mathit{p}$ gives the solutions $\frac{\mathit{k}}{4}\pm \frac{\sqrt{{\mathit{k}}^2+32\mathit{p}}}{4}$
Choices A, C, and D are incorrect and may be the result of errors in applying the quadratic formula.