n> <span class="number">4</span> <span class="special">*</span> <span class="identifier">c</span><span class="special">))</span> <span class="special">/</span> <span class="number">2</span><span class="special">,</span>
    <span class="special">(</span><span class="identifier">minus_b</span> <span class="special">+</span> <span class="identifier">sqrt</span><span class="special">(</span><span class="identifier">minus_b</span> <span class="special">*</span> <span class="identifier">minus_b</span> <span clas