mainwindow.cpp edited online with Bitbucket - removí unos comentarios que delataban la respuesta.

mainwindow.cpp

 
 
     frogger = new frog;
-    //ui->x1Label->setText(fr);
-   // ui->x1Label->move(frogger->xnenu2, 300);
+
     globalTimer = new QTimer;
     scene->addWidget(frogger);
 
         c        = values[i+2];
         expected = values[i+3];
 
-        // firstX = (((-b) + sqrt((pow(b,2)) - 4*a*c))/(2*a));
         resultFromFunction = frogger->QuadraticPlus(a,b,c);
 
         if( abs(resultFromFunction - expected) > 0.00001) {
         c        = valuesForMinus[i+2];
         expected = valuesForMinus[i+3];
 
-        // firstX = (((-b) + sqrt((pow(b,2)) - 4*a*c))/(2*a));
         resultFromFunction = frogger->QuadraticMinus(a,b,c);
 
         if( abs(resultFromFunction - expected) > 0.00001) {