From 5cbce3c1162b9fe70a7a80c5a083815c229159c9 Mon Sep 17 00:00:00 2001
From: Laury <laurianfournier@gmail.com>
Date: Fri, 3 Dec 2021 13:19:56 +0100
Subject: [PATCH] [calculation] Fix a bug in second degree controller

---
 .../additional_outputs/second_degree_list_controller.cpp     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/apps/calculation/additional_outputs/second_degree_list_controller.cpp b/apps/calculation/additional_outputs/second_degree_list_controller.cpp
index 26ad391ae..8e2b804e7 100644
--- a/apps/calculation/additional_outputs/second_degree_list_controller.cpp
+++ b/apps/calculation/additional_outputs/second_degree_list_controller.cpp
@@ -212,6 +212,7 @@ void SecondDegreeListController::setExpression(Poincare::Expression e) {
   else if (m_numberOfSolutions == 1) {
     Expression x0Opposite = getOppositeIfExists(x0, &reductionContext);
     Expression factor;
+    
     if (x0Opposite.isUninitialized()) {
       PoincareHelpers::Simplify(&x0, context, ExpressionNode::ReductionTarget::User);
       factor = Subtraction::Builder(Symbol::Builder("x", strlen("x")), x0);
@@ -220,6 +221,7 @@ void SecondDegreeListController::setExpression(Poincare::Expression e) {
       PoincareHelpers::Simplify(&x0Opposite, context, ExpressionNode::ReductionTarget::User);
       factor = Addition::Builder(Symbol::Builder("x", strlen("x")), x0Opposite);
     }
+
     Expression solutionProduct = Power::Builder(Parenthesis::Builder(factor), Rational::Builder(2));
     switch (multiplicationTypeForA)
     {
@@ -262,6 +264,9 @@ Expression SecondDegreeListController::getOppositeIfExists(Expression e, Poincar
     Number n = static_cast<Number&>(e);
     return std::move(n.setSign(ExpressionNode::Sign::Positive));
   }
+  else if(e.type() == ExpressionNode::Type::Opposite) {
+    return std::move(e.childAtIndex(0).clone());
+  }
   else if (e.type() == ExpressionNode::Type::Multiplication && e.numberOfChildren() > 0 && e.childAtIndex(0).isNumber() && e.childAtIndex(0).sign(reductionContext->context()) == ExpressionNode::Sign::Negative) {
     Multiplication m = static_cast<Multiplication&>(e);
     if (m.childAtIndex(0).type() == ExpressionNode::Type::Rational && static_cast<Rational&>(e).isMinusOne()) {