diff --git a/uni/mmme/1026_maths_for_engineering/complex_numbers.md b/uni/mmme/1026_maths_for_engineering/complex_numbers.md
index fd0262a..d830bee 100755
--- a/uni/mmme/1026_maths_for_engineering/complex_numbers.md
+++ b/uni/mmme/1026_maths_for_engineering/complex_numbers.md
@@ -38,11 +38,11 @@ uuid: b9be8780-1ab7-402f-9c67-8cc74a74f7a9
 
 Given complex number $z$:
 
-$$z = z + iy$$
+$$z = x + iy$$
 
 The complex conjugate of z, $\bar z$ is:
 
-$$\bar{z} = z -iy$$
+$$\bar{z} = x -iy$$
 
 ### Division of Complex Numbers