diff --git a/SCE/SCE/INTEGRAL.cpp b/SCE/SCE/INTEGRAL.cpp
index d601d06..ec57fde 100644
--- a/SCE/SCE/INTEGRAL.cpp
+++ b/SCE/SCE/INTEGRAL.cpp
@@ -18,10 +18,10 @@ long double INTEGRAL::trapz(long double x0, long double x1, long double precisio
 {
 	long double A = 0, a = x0, b = a + precision;
 	
-	for(; a < x1; a += precision)
+	for(; a < x1; a += precision, b += precision)
 	{
 		A += (b - a)*((funkt(b) + funkt(a))/2);
-		b += precision;
+		
 	}
 
 	return A;
@@ -37,6 +37,7 @@ long double INTEGRAL::quad(/*long double (* funk)(long double), */long double x0
 		A += fak*funkt(a);
 		i % 2 ? fak = 2 : fak = 4;
 	}
+	A += funkt(a);
 	return A*precision/3;
 }
 
diff --git a/SCE/SCE/OPTIMIZATION.cpp b/SCE/SCE/OPTIMIZATION.cpp
index 3d221e5..6a915fd 100644
--- a/SCE/SCE/OPTIMIZATION.cpp
+++ b/SCE/SCE/OPTIMIZATION.cpp
@@ -9,6 +9,6 @@ OPTIMIZATION::~OPTIMIZATION()
 
 long double OPTIMIZATION::g_von_theta(long double x, long double y)
 {
-	return -(2*x + y*y);
+	return -(x*x + y*y);
 }