s="identifier">sqrt</span><span class="special">(</span><span class="number">1</span> <span class="special">-</span> <span class="identifier">b2</span> <span class="special">/</span> <span class="identifier">a2</span><span class="special">);</span>
      <span class="identifier">T</span> <span class="identifier">Ek</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifie