s="number">64</span><span class="special">):</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"quadratic_estimation"</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">estimated</span><span class="special">.</span><span class="identifier">first</span> <span class="special">==</span> <span class="keyword">double</span><span class="special">(</span><span class="identifier">root1</