pan class="n">discr</span> <span class="o">=</span> <span class="n">sqrt</span><span class="p">((</span><span class="n">b</span> <span class="o">*</span> <span class="n">b</span><span class="p">)</span> <span class="o">-</span><span class="p">(</span><span class="mi">4</span> <span class="o">*</span> <span class="n">a</span> <span class="o">*</span> <span class="n">c</span><span class="p">);</span>
    <span class="n">root1</span> <span class="o">=</span> <span class="p">(</span><span class="o">-</span><spa