ss="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">second</span> <span class="special">==</span> <span class="keyword">double</span><span class="special">(</span><span class="identifier">root2</span><span class="special">)</span> <span class="identifier">has</span> <span class="identifier">failed</span> <span class="special">[-</span><span class="identifi