From cbcf15e5ca7beade3365d1ca3d8a039702e1a5f4 Mon Sep 17 00:00:00 2001
From: Alexander Zhirov <alexander@zhirov.website>
Date: Fri, 1 Oct 2021 19:22:44 +0300
Subject: [PATCH] replaced addition to subtraction in a 2x2 matrix

---
 lesson_3/exercise_2.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lesson_3/exercise_2.cpp b/lesson_3/exercise_2.cpp
index 1962836..74ed2b6 100644
--- a/lesson_3/exercise_2.cpp
+++ b/lesson_3/exercise_2.cpp
@@ -98,7 +98,7 @@ double Matrix::calculateDeterminant(Matrix &arr)
     }
     else if (arr.size() == 2)
     {
-        determinant = arr[0][0] * arr[1][1] + arr[1][0] * arr[0][1];
+        determinant = arr[0][0] * arr[1][1] - arr[1][0] * arr[0][1];
     }
     else
     {